427657619 has 2 divisors, whose sum is σ = 427657620. Its totient is φ = 427657618.

The previous prime is 427657613. The next prime is 427657621. The reversal of 427657619 is 916756724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427657619 - 2⁴ = 427657603 is a prime.

It is a super-2 number, since 2×427657619² = 365782078177498322, which contains 22 as substring.

Together with 427657621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (427657613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213828809 + 213828810.

It is an arithmetic number, because the mean of its divisors is an integer number (213828810).

Almost surely, 2^427657619 is an apocalyptic number.

427657619 is a deficient number, since it is larger than the sum of its proper divisors (1).

427657619 is an equidigital number, since it uses as much as digits as its factorization.

427657619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 427657619 is about 20679.8844048994. The cubic root of 427657619 is about 753.4111986282.

The spelling of 427657619 in words is "four hundred twenty-seven million, six hundred fifty-seven thousand, six hundred nineteen".