90632387 has 2 divisors, whose sum is σ = 90632388. Its totient is φ = 90632386.

The previous prime is 90632383. The next prime is 90632417. The reversal of 90632387 is 78323609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90632387 - 2² = 90632383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90632387.

It is not a weakly prime, because it can be changed into another prime (90632383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45316193 + 45316194.

It is an arithmetic number, because the mean of its divisors is an integer number (45316194).

Almost surely, 2^90632387 is an apocalyptic number.

90632387 is a deficient number, since it is larger than the sum of its proper divisors (1).

90632387 is an equidigital number, since it uses as much as digits as its factorization.

90632387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 90632387 is about 9520.1043586717. The cubic root of 90632387 is about 449.1876488092.

It can be divided in two parts, 90632 and 387, that added together give a palindrome (91019).

The spelling of 90632387 in words is "ninety million, six hundred thirty-two thousand, three hundred eighty-seven".