739981 has 4 divisors (see below), whose sum is σ = 807264. Its totient is φ = 672700.

The previous prime is 739969. The next prime is 740011. The reversal of 739981 is 189937.

739981 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.

It is a cyclic number.

It is not a de Polignac number, because 739981 - 2⁷ = 739853 is a prime.

It is a super-2 number, since 2×739981² = 1095143760722, which contains 22 as substring.

It is a Duffinian number.

739981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 739981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (739931) 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, 33625 + ... + 33646.

It is an arithmetic number, because the mean of its divisors is an integer number (201816).

2⁷³⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

739981 is a deficient number, since it is larger than the sum of its proper divisors (67283).

739981 is a wasteful number, since it uses less digits than its factorization.

739981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67282.

The product of its digits is 13608, while the sum is 37.

The square root of 739981 is about 860.2214831077. The cubic root of 739981 is about 90.4496428333.

The spelling of 739981 in words is "seven hundred thirty-nine thousand, nine hundred eighty-one".