749261881 has 4 divisors (see below), whose sum is σ = 749689600. Its totient is φ = 748834164.

The previous prime is 749261801. The next prime is 749261911. The reversal of 749261881 is 188162947.

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.

It is a cyclic number.

It is not a de Polignac number, because 749261881 - 2⁷ = 749261753 is a prime.

It is a super-2 number, since 2×749261881² = 1122786732639316322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749261801) 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, 211221 + ... + 214738.

It is an arithmetic number, because the mean of its divisors is an integer number (187422400).

Almost surely, 2^749261881 is an apocalyptic number.

It is an amenable number.

749261881 is a deficient number, since it is larger than the sum of its proper divisors (427719).

749261881 is a wasteful number, since it uses less digits than its factorization.

749261881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427718.

The product of its digits is 193536, while the sum is 46.

The square root of 749261881 is about 27372.6484104114. The cubic root of 749261881 is about 908.2621427545.

The spelling of 749261881 in words is "seven hundred forty-nine million, two hundred sixty-one thousand, eight hundred eighty-one".