634942519 has 2 divisors, whose sum is σ = 634942520. Its totient is φ = 634942518.

The previous prime is 634942499. The next prime is 634942541. The reversal of 634942519 is 915249436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634942519 - 2¹⁷ = 634811447 is a prime.

It is a super-2 number, since 2×634942519² = 806304004868130722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634940519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317471259 + 317471260.

It is an arithmetic number, because the mean of its divisors is an integer number (317471260).

Almost surely, 2^634942519 is an apocalyptic number.

634942519 is a deficient number, since it is larger than the sum of its proper divisors (1).

634942519 is an equidigital number, since it uses as much as digits as its factorization.

634942519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 634942519 is about 25198.0657789442. The cubic root of 634942519 is about 859.4978675921.

The spelling of 634942519 in words is "six hundred thirty-four million, nine hundred forty-two thousand, five hundred nineteen".