36518639 has 2 divisors, whose sum is σ = 36518640. Its totient is φ = 36518638.

The previous prime is 36518617. The next prime is 36518663. The reversal of 36518639 is 93681563.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36518639 - 2²⁰ = 35470063 is a prime.

It is a super-2 number, since 2×36518639² = 2667221988824642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 36518596 and 36518605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36518239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18259319 + 18259320.

It is an arithmetic number, because the mean of its divisors is an integer number (18259320).

Almost surely, 2^36518639 is an apocalyptic number.

36518639 is a deficient number, since it is larger than the sum of its proper divisors (1).

36518639 is an equidigital number, since it uses as much as digits as its factorization.

36518639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 36518639 is about 6043.0653645315. The cubic root of 36518639 is about 331.7708263826.

The spelling of 36518639 in words is "thirty-six million, five hundred eighteen thousand, six hundred thirty-nine".