977142503713421 has 2 divisors, whose sum is σ = 977142503713422. Its totient is φ = 977142503713420.

The previous prime is 977142503713391. The next prime is 977142503713429. The reversal of 977142503713421 is 124317305241779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914111384775625 + 63031118937796 = 30234275^2 + 7939214^2 .

It is a cyclic number.

It is not a de Polignac number, because 977142503713421 - 2²⁶ = 977142436604557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (977142503713429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488571251856710 + 488571251856711.

It is an arithmetic number, because the mean of its divisors is an integer number (488571251856711).

Almost surely, 2^{977142503713421} is an apocalyptic number.

It is an amenable number.

977142503713421 is a deficient number, since it is larger than the sum of its proper divisors (1).

977142503713421 is an equidigital number, since it uses as much as digits as its factorization.

977142503713421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 977142503713421 in words is "nine hundred seventy-seven trillion, one hundred forty-two billion, five hundred three million, seven hundred thirteen thousand, four hundred twenty-one".