90247631 has 2 divisors, whose sum is σ = 90247632. Its totient is φ = 90247630.

The previous prime is 90247621. The next prime is 90247667. The reversal of 90247631 is 13674209.

It is a weak prime.

It is an emirp because it is prime and its reverse (13674209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90247631 - 2¹⁸ = 89985487 is a prime.

It is a super-2 number, since 2×90247631² = 16289269802224322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90247621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45123815 + 45123816.

It is an arithmetic number, because the mean of its divisors is an integer number (45123816).

Almost surely, 2^90247631 is an apocalyptic number.

90247631 is a deficient number, since it is larger than the sum of its proper divisors (1).

90247631 is an equidigital number, since it uses as much as digits as its factorization.

90247631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 90247631 is about 9499.8753149712. The cubic root of 90247631 is about 448.5511111359.

The spelling of 90247631 in words is "ninety million, two hundred forty-seven thousand, six hundred thirty-one".