90624947 has 4 divisors (see below), whose sum is σ = 103571376. Its totient is φ = 77678520.

The previous prime is 90624923. The next prime is 90624967. The reversal of 90624947 is 74942609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90624947 - 2⁸ = 90624691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90624967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6473204 + ... + 6473217.

It is an arithmetic number, because the mean of its divisors is an integer number (25892844).

Almost surely, 2^90624947 is an apocalyptic number.

90624947 is a deficient number, since it is larger than the sum of its proper divisors (12946429).

90624947 is a wasteful number, since it uses less digits than its factorization.

90624947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946428.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 90624947 is about 9519.7135986331. The cubic root of 90624947 is about 449.1753572223.

The spelling of 90624947 in words is "ninety million, six hundred twenty-four thousand, nine hundred forty-seven".