1012549979 has 16 divisors (see below), whose sum is σ = 1167943680. Its totient is φ = 859874400.

The previous prime is 1012549961. The next prime is 1012550003. The reversal of 1012549979 is 9799452101.

It is not a de Polignac number, because 1012549979 - 2²⁸ = 744114523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012549949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488357 + ... + 490425.

It is an arithmetic number, because the mean of its divisors is an integer number (72996480).

Almost surely, 2^1012549979 is an apocalyptic number.

1012549979 is a deficient number, since it is larger than the sum of its proper divisors (155393701).

1012549979 is a wasteful number, since it uses less digits than its factorization.

1012549979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 1012549979 is about 31820.5904879215. The cubic root of 1012549979 is about 1004.1659471178.

The spelling of 1012549979 in words is "one billion, twelve million, five hundred forty-nine thousand, nine hundred seventy-nine".