127790431 has 2 divisors, whose sum is σ = 127790432. Its totient is φ = 127790430.

The previous prime is 127790413. The next prime is 127790471. The reversal of 127790431 is 134097721.

Together with previous prime (127790413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127790431 is a prime.

It is a super-2 number, since 2×127790431² = 32660788510331522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127790471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63895215 + 63895216.

It is an arithmetic number, because the mean of its divisors is an integer number (63895216).

Almost surely, 2^127790431 is an apocalyptic number.

127790431 is a deficient number, since it is larger than the sum of its proper divisors (1).

127790431 is an equidigital number, since it uses as much as digits as its factorization.

127790431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 127790431 is about 11304.4429761046. The cubic root of 127790431 is about 503.6932276387.

The spelling of 127790431 in words is "one hundred twenty-seven million, seven hundred ninety thousand, four hundred thirty-one".