749618981 has 4 divisors (see below), whose sum is σ = 760807392. Its totient is φ = 738430572.

The previous prime is 749618971. The next prime is 749618993. The reversal of 749618981 is 189816947.

749618981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189816947 = 733 ⋅258959.

It is a cyclic number.

It is not a de Polignac number, because 749618981 - 2⁶ = 749618917 is a prime.

It is a super-2 number, since 2×749618981² = 1123857233350956722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749618971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594105 + ... + 5594238.

It is an arithmetic number, because the mean of its divisors is an integer number (190201848).

Almost surely, 2^749618981 is an apocalyptic number.

It is an amenable number.

749618981 is a deficient number, since it is larger than the sum of its proper divisors (11188411).

749618981 is a wasteful number, since it uses less digits than its factorization.

749618981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11188410.

The product of its digits is 870912, while the sum is 53.

The square root of 749618981 is about 27379.1705681527. The cubic root of 749618981 is about 908.4064131384.

The spelling of 749618981 in words is "seven hundred forty-nine million, six hundred eighteen thousand, nine hundred eighty-one".