979618669 has 4 divisors (see below), whose sum is σ = 980923840. Its totient is φ = 978313500.

The previous prime is 979618667. The next prime is 979618709. The reversal of 979618669 is 966816979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 979618669 - 2¹ = 979618667 is a prime.

It is a super-2 number, since 2×979618669² = 1919305473306663122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979618667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651459 + ... + 652960.

It is an arithmetic number, because the mean of its divisors is an integer number (245230960).

Almost surely, 2^979618669 is an apocalyptic number.

It is an amenable number.

979618669 is a deficient number, since it is larger than the sum of its proper divisors (1305171).

979618669 is a wasteful number, since it uses less digits than its factorization.

979618669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305170.

The product of its digits is 8817984, while the sum is 61.

The square root of 979618669 is about 31298.8605064146. The cubic root of 979618669 is about 993.1595377693.

The spelling of 979618669 in words is "nine hundred seventy-nine million, six hundred eighteen thousand, six hundred sixty-nine".