90107639 has 2 divisors, whose sum is σ = 90107640. Its totient is φ = 90107638.

The previous prime is 90107621. The next prime is 90107653. The reversal of 90107639 is 93670109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90107639 - 2⁸ = 90107383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90107599 and 90107608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90107609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45053819 + 45053820.

It is an arithmetic number, because the mean of its divisors is an integer number (45053820).

Almost surely, 2^90107639 is an apocalyptic number.

90107639 is a deficient number, since it is larger than the sum of its proper divisors (1).

90107639 is an equidigital number, since it uses as much as digits as its factorization.

90107639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 90107639 is about 9492.5043587032. The cubic root of 90107639 is about 448.3190604885.

The spelling of 90107639 in words is "ninety million, one hundred seven thousand, six hundred thirty-nine".