9957225457 has 2 divisors, whose sum is σ = 9957225458. Its totient is φ = 9957225456.

The previous prime is 9957225449. The next prime is 9957225479. The reversal of 9957225457 is 7545227599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7799715856 + 2157509601 = 88316^2 + 46449^2 .

It is a cyclic number.

It is not a de Polignac number, because 9957225457 - 2³ = 9957225449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9957225398 and 9957225407.

It is not a weakly prime, because it can be changed into another prime (9957225497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4978612728 + 4978612729.

It is an arithmetic number, because the mean of its divisors is an integer number (4978612729).

Almost surely, 2^9957225457 is an apocalyptic number.

It is an amenable number.

9957225457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9957225457 is an equidigital number, since it uses as much as digits as its factorization.

9957225457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938000, while the sum is 55.

The square root of 9957225457 is about 99785.8980868539. The cubic root of 9957225457 is about 2151.3584677440.

The spelling of 9957225457 in words is "nine billion, nine hundred fifty-seven million, two hundred twenty-five thousand, four hundred fifty-seven".