90809707 has 2 divisors, whose sum is σ = 90809708. Its totient is φ = 90809706.

The previous prime is 90809657. The next prime is 90809713. The reversal of 90809707 is 70790809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90809707 - 2²³ = 82421099 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90809707.

It is not a weakly prime, because it can be changed into another prime (90809777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45404853 + 45404854.

It is an arithmetic number, because the mean of its divisors is an integer number (45404854).

Almost surely, 2^90809707 is an apocalyptic number.

90809707 is a deficient number, since it is larger than the sum of its proper divisors (1).

90809707 is an equidigital number, since it uses as much as digits as its factorization.

90809707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 90809707 is about 9529.4127311183. The cubic root of 90809707 is about 449.4803994418.

The spelling of 90809707 in words is "ninety million, eight hundred nine thousand, seven hundred seven".