977309873 has 4 divisors (see below), whose sum is σ = 977597988. Its totient is φ = 977021760.

The previous prime is 977309863. The next prime is 977309887. The reversal of 977309873 is 378903779.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378903779 = 2521 ⋅150299.

It can be written as a sum of positive squares in 2 ways, for example, as 490533904 + 486775969 = 22148^2 + 22063^2 .

It is a cyclic number.

It is not a de Polignac number, because 977309873 - 2⁴ = 977309857 is a prime.

It is a super-2 number, since 2×977309873² = 1910269175726552258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (977309863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138908 + ... + 145773.

It is an arithmetic number, because the mean of its divisors is an integer number (244399497).

Almost surely, 2^977309873 is an apocalyptic number.

It is an amenable number.

977309873 is a deficient number, since it is larger than the sum of its proper divisors (288115).

977309873 is a wasteful number, since it uses less digits than its factorization.

977309873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288114.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The square root of 977309873 is about 31261.9556809871. The cubic root of 977309873 is about 992.3786874887.

The spelling of 977309873 in words is "nine hundred seventy-seven million, three hundred nine thousand, eight hundred seventy-three".