427637779 has 4 divisors (see below), whose sum is σ = 428120784. Its totient is φ = 427154776.

The previous prime is 427637773. The next prime is 427637801. The reversal of 427637779 is 977736724.

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 427637779 - 2⁵ = 427637747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427637773) 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, 240172 + ... + 241945.

It is an arithmetic number, because the mean of its divisors is an integer number (107030196).

Almost surely, 2^427637779 is an apocalyptic number.

427637779 is a deficient number, since it is larger than the sum of its proper divisors (483005).

427637779 is an equidigital number, since it uses as much as digits as its factorization.

427637779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483004.

The product of its digits is 3111696, while the sum is 52.

The square root of 427637779 is about 20679.4047061321. The cubic root of 427637779 is about 753.3995476340.

The spelling of 427637779 in words is "four hundred twenty-seven million, six hundred thirty-seven thousand, seven hundred seventy-nine".