90074987 has 2 divisors, whose sum is σ = 90074988. Its totient is φ = 90074986.

The previous prime is 90074977. The next prime is 90075043. The reversal of 90074987 is 78947009.

It is a weak prime.

It is an emirp because it is prime and its reverse (78947009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90074987 - 2²⁶ = 22966123 is a prime.

It is a super-2 number, since 2×90074987² = 16227006566100338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90074917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45037493 + 45037494.

It is an arithmetic number, because the mean of its divisors is an integer number (45037494).

Almost surely, 2^90074987 is an apocalyptic number.

90074987 is a deficient number, since it is larger than the sum of its proper divisors (1).

90074987 is an equidigital number, since it uses as much as digits as its factorization.

90074987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 90074987 is about 9490.7843195386. The cubic root of 90074987 is about 448.2649019930.

The spelling of 90074987 in words is "ninety million, seventy-four thousand, nine hundred eighty-seven".