67790431 has 2 divisors, whose sum is σ = 67790432. Its totient is φ = 67790430.

The previous prime is 67790419. The next prime is 67790449. The reversal of 67790431 is 13409776.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67790431 is a prime.

It is a super-2 number, since 2×67790431² = 9191085070331522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67790491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33895215 + 33895216.

It is an arithmetic number, because the mean of its divisors is an integer number (33895216).

Almost surely, 2^67790431 is an apocalyptic number.

67790431 is a deficient number, since it is larger than the sum of its proper divisors (1).

67790431 is an equidigital number, since it uses as much as digits as its factorization.

67790431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 67790431 is about 8233.4944586123. The cubic root of 67790431 is about 407.7457706695.

The spelling of 67790431 in words is "sixty-seven million, seven hundred ninety thousand, four hundred thirty-one".