90637069 has 2 divisors, whose sum is σ = 90637070. Its totient is φ = 90637068.

The previous prime is 90637061. The next prime is 90637133. The reversal of 90637069 is 96073609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66015625 + 24621444 = 8125^2 + 4962^2 .

It is an emirp because it is prime and its reverse (96073609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90637069 - 2³ = 90637061 is a prime.

It is a super-2 number, since 2×90637069² = 16430156553821522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90637061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45318534 + 45318535.

It is an arithmetic number, because the mean of its divisors is an integer number (45318535).

Almost surely, 2^90637069 is an apocalyptic number.

It is an amenable number.

90637069 is a deficient number, since it is larger than the sum of its proper divisors (1).

90637069 is an equidigital number, since it uses as much as digits as its factorization.

90637069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 90637069 is about 9520.3502561618. The cubic root of 90637069 is about 449.1953835731.

The spelling of 90637069 in words is "ninety million, six hundred thirty-seven thousand, sixty-nine".