127902431997 has 8 divisors (see below), whose sum is σ = 189485084480. Its totient is φ = 85268287980.

The previous prime is 127902431971. The next prime is 127902432023. The reversal of 127902431997 is 799134209721.

It is a happy number.

127902431997 is a `hidden beast` number, since 127 + 90 + 243 + 199 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (127902431971) and next prime (127902432023).

It is not a de Polignac number, because 127902431997 - 2¹⁸ = 127902169853 is a prime.

It is a super-2 number, since 2×127902431997² (a number of 23 digits) 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 (127902431927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2368563529 + ... + 2368563582.

It is an arithmetic number, because the mean of its divisors is an integer number (23685635560).

Almost surely, 2^127902431997 is an apocalyptic number.

It is an amenable number.

127902431997 is a deficient number, since it is larger than the sum of its proper divisors (61582652483).

127902431997 is an equidigital number, since it uses as much as digits as its factorization.

127902431997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737127120 (or 4737127114 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 127902431997 in words is "one hundred twenty-seven billion, nine hundred two million, four hundred thirty-one thousand, nine hundred ninety-seven".