623954472971 has 2 divisors, whose sum is σ = 623954472972. Its totient is φ = 623954472970.

The previous prime is 623954472929. The next prime is 623954472989. The reversal of 623954472971 is 179274459326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623954472971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623954472971.

It is not a weakly prime, because it can be changed into another prime (623954472991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311977236485 + 311977236486.

It is an arithmetic number, because the mean of its divisors is an integer number (311977236486).

Almost surely, 2^623954472971 is an apocalyptic number.

623954472971 is a deficient number, since it is larger than the sum of its proper divisors (1).

623954472971 is an equidigital number, since it uses as much as digits as its factorization.

623954472971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 59.

The spelling of 623954472971 in words is "six hundred twenty-three billion, nine hundred fifty-four million, four hundred seventy-two thousand, nine hundred seventy-one".