977242831 has 4 divisors (see below), whose sum is σ = 1001078064. Its totient is φ = 953407600.

The previous prime is 977242817. The next prime is 977242921. The reversal of 977242831 is 138242779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138242779 = 1453 ⋅95143.

It is a cyclic number.

It is not a de Polignac number, because 977242831 - 2⁷ = 977242703 is a prime.

It is a super-2 number, since 2×977242831² = 1910007101481789122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977242801) 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 in 3 ways as a sum of consecutive naturals, for example, 11917555 + ... + 11917636.

It is an arithmetic number, because the mean of its divisors is an integer number (250269516).

Almost surely, 2^977242831 is an apocalyptic number.

977242831 is a deficient number, since it is larger than the sum of its proper divisors (23835233).

977242831 is a wasteful number, since it uses less digits than its factorization.

977242831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23835232.

The product of its digits is 169344, while the sum is 43.

The square root of 977242831 is about 31260.8834008254. The cubic root of 977242831 is about 992.3559950704.

The spelling of 977242831 in words is "nine hundred seventy-seven million, two hundred forty-two thousand, eight hundred thirty-one".