427091979 has 16 divisors (see below), whose sum is σ = 574140672. Its totient is φ = 282393888.

The previous prime is 427091941. The next prime is 427091981. The reversal of 427091979 is 979190724.

It is a happy number.

It is not a de Polignac number, because 427091979 - 2⁸ = 427091723 is a prime.

It is a super-2 number, since 2×427091979² = 364815117052272882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (427091939) 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, 366652 + ... + 367814.

It is an arithmetic number, because the mean of its divisors is an integer number (35883792).

Almost surely, 2^427091979 is an apocalyptic number.

427091979 is a deficient number, since it is larger than the sum of its proper divisors (147048693).

427091979 is a wasteful number, since it uses less digits than its factorization.

427091979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066.

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 427091979 is about 20666.2037878271. The cubic root of 427091979 is about 753.0788864266.

The spelling of 427091979 in words is "four hundred twenty-seven million, ninety-one thousand, nine hundred seventy-nine".