731520889 has 8 divisors (see below), whose sum is σ = 804307968. Its totient is φ = 659781360.

The previous prime is 731520883. The next prime is 731520901. The reversal of 731520889 is 988025137.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 731520889 - 2¹³ = 731512697 is a prime.

It is a super-2 number, since 2×731520889² = 1070245622086700642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731520883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260422 + ... + 263215.

It is an arithmetic number, because the mean of its divisors is an integer number (100538496).

Almost surely, 2^731520889 is an apocalyptic number.

It is an amenable number.

731520889 is a deficient number, since it is larger than the sum of its proper divisors (72787079).

731520889 is a wasteful number, since it uses less digits than its factorization.

731520889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523775.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 731520889 is about 27046.6428415802. The cubic root of 731520889 is about 901.0362093896.

The spelling of 731520889 in words is "seven hundred thirty-one million, five hundred twenty thousand, eight hundred eighty-nine".