90307093 has 2 divisors, whose sum is σ = 90307094. Its totient is φ = 90307092.

The previous prime is 90307079. The next prime is 90307127. The reversal of 90307093 is 39070309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87740689 + 2566404 = 9367^2 + 1602^2 .

It is a cyclic number.

It is not a de Polignac number, because 90307093 - 2⁹ = 90306581 is a prime.

It is a super-2 number, since 2×90307093² = 16310742092221298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90307003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45153546 + 45153547.

It is an arithmetic number, because the mean of its divisors is an integer number (45153547).

Almost surely, 2^90307093 is an apocalyptic number.

It is an amenable number.

90307093 is a deficient number, since it is larger than the sum of its proper divisors (1).

90307093 is an equidigital number, since it uses as much as digits as its factorization.

90307093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 90307093 is about 9503.0044196559. The cubic root of 90307093 is about 448.6496026982.

The spelling of 90307093 in words is "ninety million, three hundred seven thousand, ninety-three".