1977088994 has 8 divisors (see below), whose sum is σ = 2968263660. Its totient is φ = 987667776.

The previous prime is 1977088973. The next prime is 1977089011. The reversal of 1977088994 is 4998807791.

It can be written as a sum of positive squares in 2 ways, for example, as 1867363369 + 109725625 = 43213^2 + 10475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435539 + ... + 440054.

Almost surely, 2^1977088994 is an apocalyptic number.

1977088994 is a deficient number, since it is larger than the sum of its proper divisors (991174666).

1977088994 is a wasteful number, since it uses less digits than its factorization.

1977088994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876724.

The product of its (nonzero) digits is 9144576, while the sum is 62.

The square root of 1977088994 is about 44464.4688937133. The cubic root of 1977088994 is about 1255.0915514446.

The spelling of 1977088994 in words is "one billion, nine hundred seventy-seven million, eighty-eight thousand, nine hundred ninety-four".