118640519 has 2 divisors, whose sum is σ = 118640520. Its totient is φ = 118640518.

The previous prime is 118640507. The next prime is 118640521. The reversal of 118640519 is 915046811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118640519 is a prime.

It is a super-2 number, since 2×118640519² = 28151145497178722, which contains 22 as substring.

Together with 118640521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118640539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59320259 + 59320260.

It is an arithmetic number, because the mean of its divisors is an integer number (59320260).

Almost surely, 2^118640519 is an apocalyptic number.

118640519 is a deficient number, since it is larger than the sum of its proper divisors (1).

118640519 is an equidigital number, since it uses as much as digits as its factorization.

118640519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 118640519 is about 10892.2228677162. Note that the first 3 decimals coincide. The cubic root of 118640519 is about 491.3726871257.

The spelling of 118640519 in words is "one hundred eighteen million, six hundred forty thousand, five hundred nineteen".