747067991 has 8 divisors (see below), whose sum is σ = 779856000. Its totient is φ = 714305592.

The previous prime is 747067967. The next prime is 747068017. The reversal of 747067991 is 199760747.

It is a happy number.

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 747067991 - 2¹⁰ = 747066967 is a prime.

It is a super-2 number, since 2×747067991² = 1116221166353552162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747067921) 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, 75836 + ... + 85118.

It is an arithmetic number, because the mean of its divisors is an integer number (97482000).

Almost surely, 2^747067991 is an apocalyptic number.

747067991 is a deficient number, since it is larger than the sum of its proper divisors (32788009).

747067991 is a wasteful number, since it uses less digits than its factorization.

747067991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 747067991 is about 27332.5445394314. The cubic root of 747067991 is about 907.3747915705.

The spelling of 747067991 in words is "seven hundred forty-seven million, sixty-seven thousand, nine hundred ninety-one".