90699137 has 2 divisors, whose sum is σ = 90699138. Its totient is φ = 90699136.

The previous prime is 90699113. The next prime is 90699139. The reversal of 90699137 is 73199609.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 29170801 = 7844^2 + 5401^2 .

It is a cyclic number.

It is not a de Polignac number, because 90699137 - 2⁶ = 90699073 is a prime.

Together with 90699139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90699139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45349568 + 45349569.

It is an arithmetic number, because the mean of its divisors is an integer number (45349569).

Almost surely, 2^90699137 is an apocalyptic number.

It is an amenable number.

90699137 is a deficient number, since it is larger than the sum of its proper divisors (1).

90699137 is an equidigital number, since it uses as much as digits as its factorization.

90699137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 90699137 is about 9523.6094523033. The cubic root of 90699137 is about 449.2978960719.

The spelling of 90699137 in words is "ninety million, six hundred ninety-nine thousand, one hundred thirty-seven".