655673979 has 8 divisors (see below), whose sum is σ = 879286032. Its totient is φ = 434588960.

The previous prime is 655673959. The next prime is 655673987. The reversal of 655673979 is 979376556.

It is a happy number.

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 655673979 - 2²¹ = 653576827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655673939) 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, 631152 + ... + 632189.

It is an arithmetic number, because the mean of its divisors is an integer number (109910754).

Almost surely, 2^655673979 is an apocalyptic number.

655673979 is a deficient number, since it is larger than the sum of its proper divisors (223612053).

655673979 is a wasteful number, since it uses less digits than its factorization.

655673979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263517.

The product of its digits is 10716300, while the sum is 57.

The square root of 655673979 is about 25606.1316680205. The cubic root of 655673979 is about 868.7523310049.

The spelling of 655673979 in words is "six hundred fifty-five million, six hundred seventy-three thousand, nine hundred seventy-nine".