90136139 has 2 divisors, whose sum is σ = 90136140. Its totient is φ = 90136138.

The previous prime is 90136117. The next prime is 90136153. The reversal of 90136139 is 93163109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90136139 - 2¹² = 90132043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90136939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45068069 + 45068070.

It is an arithmetic number, because the mean of its divisors is an integer number (45068070).

Almost surely, 2^90136139 is an apocalyptic number.

90136139 is a deficient number, since it is larger than the sum of its proper divisors (1).

90136139 is an equidigital number, since it uses as much as digits as its factorization.

90136139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 90136139 is about 9494.0054244771. The cubic root of 90136139 is about 448.3663215440.

The spelling of 90136139 in words is "ninety million, one hundred thirty-six thousand, one hundred thirty-nine".