445629979 has 4 divisors (see below), whose sum is σ = 460996560. Its totient is φ = 430263400.

The previous prime is 445629923. The next prime is 445630007. The reversal of 445629979 is 979926544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445629979 - 2⁹ = 445629467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445629179) 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, 7683247 + ... + 7683304.

It is an arithmetic number, because the mean of its divisors is an integer number (115249140).

Almost surely, 2^445629979 is an apocalyptic number.

445629979 is a deficient number, since it is larger than the sum of its proper divisors (15366581).

445629979 is a wasteful number, since it uses less digits than its factorization.

445629979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366580.

The product of its digits is 4898880, while the sum is 55.

The square root of 445629979 is about 21109.9497630857. The cubic root of 445629979 is about 763.8207750742.

The spelling of 445629979 in words is "four hundred forty-five million, six hundred twenty-nine thousand, nine hundred seventy-nine".