90447645 has 8 divisors (see below), whose sum is σ = 144716256. Its totient is φ = 48238736.

The previous prime is 90447631. The next prime is 90447697. The reversal of 90447645 is 54674409.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90447645 - 2⁵ = 90447613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3014907 + ... + 3014936.

It is an arithmetic number, because the mean of its divisors is an integer number (18089532).

Almost surely, 2^90447645 is an apocalyptic number.

It is an amenable number.

90447645 is a deficient number, since it is larger than the sum of its proper divisors (54268611).

90447645 is a wasteful number, since it uses less digits than its factorization.

90447645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029851.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 90447645 is about 9510.3966794241. The cubic root of 90447645 is about 448.8822382192.

The spelling of 90447645 in words is "ninety million, four hundred forty-seven thousand, six hundred forty-five".