29972866457 has 2 divisors, whose sum is σ = 29972866458. Its totient is φ = 29972866456.

The previous prime is 29972866433. The next prime is 29972866477. The reversal of 29972866457 is 75466827992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25047493696 + 4925372761 = 158264^2 + 70181^2 .

It is a cyclic number.

It is not a de Polignac number, because 29972866457 - 2⁸ = 29972866201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29972866393 and 29972866402.

It is not a weakly prime, because it can be changed into another prime (29972866477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986433228 + 14986433229.

It is an arithmetic number, because the mean of its divisors is an integer number (14986433229).

Almost surely, 2^29972866457 is an apocalyptic number.

It is an amenable number.

29972866457 is a deficient number, since it is larger than the sum of its proper divisors (1).

29972866457 is an equidigital number, since it uses as much as digits as its factorization.

29972866457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 65.

The spelling of 29972866457 in words is "twenty-nine billion, nine hundred seventy-two million, eight hundred sixty-six thousand, four hundred fifty-seven".