977128019 has 4 divisors (see below), whose sum is σ = 1116717744. Its totient is φ = 837538296.

The previous prime is 977128013. The next prime is 977128043. The reversal of 977128019 is 910821779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910821779 = 7 ⋅130117397.

It is not a de Polignac number, because 977128019 - 2¹² = 977123923 is a prime.

It is a super-2 number, since 2×977128019² = 1909558331029728722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977128013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69794852 + ... + 69794865.

It is an arithmetic number, because the mean of its divisors is an integer number (279179436).

Almost surely, 2^977128019 is an apocalyptic number.

977128019 is a deficient number, since it is larger than the sum of its proper divisors (139589725).

977128019 is a wasteful number, since it uses less digits than its factorization.

977128019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139589724.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 977128019 is about 31259.0469944303. The cubic root of 977128019 is about 992.3171310218.

The spelling of 977128019 in words is "nine hundred seventy-seven million, one hundred twenty-eight thousand, nineteen".