1977022979 has 8 divisors (see below), whose sum is σ = 2082168000. Its totient is φ = 1871987112.

The previous prime is 1977022963. The next prime is 1977022981. The reversal of 1977022979 is 9792207791.

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

It is a cyclic number.

It is not a de Polignac number, because 1977022979 - 2⁴ = 1977022963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1977022979.

It is not an unprimeable number, because it can be changed into a prime (1977022909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11312 + ... + 63890.

It is an arithmetic number, because the mean of its divisors is an integer number (260271000).

Almost surely, 2^1977022979 is an apocalyptic number.

1977022979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1977022979 is a deficient number, since it is larger than the sum of its proper divisors (105145021).

1977022979 is a wasteful number, since it uses less digits than its factorization.

1977022979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54577.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The square root of 1977022979 is about 44463.7265532254. The cubic root of 1977022979 is about 1255.0775821205.

The spelling of 1977022979 in words is "one billion, nine hundred seventy-seven million, twenty-two thousand, nine hundred seventy-nine".