90158461 has 2 divisors, whose sum is σ = 90158462. Its totient is φ = 90158460.

The previous prime is 90158441. The next prime is 90158491. The reversal of 90158461 is 16485109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88548100 + 1610361 = 9410^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 90158461 - 2⁷ = 90158333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90158441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45079230 + 45079231.

It is an arithmetic number, because the mean of its divisors is an integer number (45079231).

Almost surely, 2^90158461 is an apocalyptic number.

It is an amenable number.

90158461 is a deficient number, since it is larger than the sum of its proper divisors (1).

90158461 is an equidigital number, since it uses as much as digits as its factorization.

90158461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 90158461 is about 9495.1809356115. The cubic root of 90158461 is about 448.4033307727.

The spelling of 90158461 in words is "ninety million, one hundred fifty-eight thousand, four hundred sixty-one".