67904431 has 8 divisors (see below), whose sum is σ = 77692320. Its totient is φ = 58138368.

The previous prime is 67904413. The next prime is 67904449. The reversal of 67904431 is 13440976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67904413) and next prime (67904449).

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 67904431 - 2¹³ = 67896239 is a prime.

It is a super-2 number, since 2×67904431² = 9222023498867522, 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 (67904131) 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, 1875 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (9711540).

Almost surely, 2^67904431 is an apocalyptic number.

67904431 is a deficient number, since it is larger than the sum of its proper divisors (9787889).

67904431 is an equidigital number, since it uses as much as digits as its factorization.

67904431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10913.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 67904431 is about 8240.4144920022. The cubic root of 67904431 is about 407.9742050045.

The spelling of 67904431 in words is "sixty-seven million, nine hundred four thousand, four hundred thirty-one".