427188623 has 2 divisors, whose sum is σ = 427188624. Its totient is φ = 427188622.

The previous prime is 427188581. The next prime is 427188653. The reversal of 427188623 is 326881724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427188623 - 2²⁰ = 426140047 is a prime.

It is a super-2 number, since 2×427188623² = 364980239241272258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427188653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213594311 + 213594312.

It is an arithmetic number, because the mean of its divisors is an integer number (213594312).

Almost surely, 2^427188623 is an apocalyptic number.

427188623 is a deficient number, since it is larger than the sum of its proper divisors (1).

427188623 is an equidigital number, since it uses as much as digits as its factorization.

427188623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 427188623 is about 20668.5418692273. The cubic root of 427188623 is about 753.1356853290.

The spelling of 427188623 in words is "four hundred twenty-seven million, one hundred eighty-eight thousand, six hundred twenty-three".