7864172431 has 2 divisors, whose sum is σ = 7864172432. Its totient is φ = 7864172430.

The previous prime is 7864172417. The next prime is 7864172453. The reversal of 7864172431 is 1342714687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7864172431 - 2¹⁷ = 7864041359 is a prime.

It is a super-2 number, since 2×7864172431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7864172131) 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 as a sum of consecutive naturals, namely, 3932086215 + 3932086216.

It is an arithmetic number, because the mean of its divisors is an integer number (3932086216).

Almost surely, 2^7864172431 is an apocalyptic number.

7864172431 is a deficient number, since it is larger than the sum of its proper divisors (1).

7864172431 is an equidigital number, since it uses as much as digits as its factorization.

7864172431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 43.

The square root of 7864172431 is about 88680.1693221207. The cubic root of 7864172431 is about 1988.6163652780.

The spelling of 7864172431 in words is "seven billion, eight hundred sixty-four million, one hundred seventy-two thousand, four hundred thirty-one".