977871029137 has 4 divisors (see below), whose sum is σ = 984433922100. Its totient is φ = 971308136176.

The previous prime is 977871029081. The next prime is 977871029143. The reversal of 977871029137 is 731920178779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731920178779 = 97441 ⋅7511419.

It can be written as a sum of positive squares in 2 ways, for example, as 366223466896 + 611647562241 = 605164^2 + 782079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977871029137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977871029237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3281446258 + ... + 3281446555.

It is an arithmetic number, because the mean of its divisors is an integer number (246108480525).

Almost surely, 2^977871029137 is an apocalyptic number.

It is an amenable number.

977871029137 is a deficient number, since it is larger than the sum of its proper divisors (6562892963).

977871029137 is a wasteful number, since it uses less digits than its factorization.

977871029137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562892962.

The product of its (nonzero) digits is 9335088, while the sum is 61.

The spelling of 977871029137 in words is "nine hundred seventy-seven billion, eight hundred seventy-one million, twenty-nine thousand, one hundred thirty-seven".