90994487 has 2 divisors, whose sum is σ = 90994488. Its totient is φ = 90994486.

The previous prime is 90994451. The next prime is 90994499. The reversal of 90994487 is 78449909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90994487 - 2¹⁶ = 90928951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90994447) 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, 45497243 + 45497244.

It is an arithmetic number, because the mean of its divisors is an integer number (45497244).

Almost surely, 2^90994487 is an apocalyptic number.

90994487 is a deficient number, since it is larger than the sum of its proper divisors (1).

90994487 is an equidigital number, since it uses as much as digits as its factorization.

90994487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 90994487 is about 9539.1030500776. The cubic root of 90994487 is about 449.7850611385.

The spelling of 90994487 in words is "ninety million, nine hundred ninety-four thousand, four hundred eighty-seven".