90647647 has 8 divisors (see below), whose sum is σ = 92867072. Its totient is φ = 88452000.

The previous prime is 90647639. The next prime is 90647653. The reversal of 90647647 is 74674609.

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 90647647 - 2³ = 90647639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90647747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (11608384).

Almost surely, 2^90647647 is an apocalyptic number.

90647647 is a deficient number, since it is larger than the sum of its proper divisors (2219425).

90647647 is a wasteful number, since it uses less digits than its factorization.

90647647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11889.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 90647647 is about 9520.9057867411. The cubic root of 90647647 is about 449.2128576742.

The spelling of 90647647 in words is "ninety million, six hundred forty-seven thousand, six hundred forty-seven".