90748647 has 16 divisors (see below), whose sum is σ = 146664960. Its totient is φ = 54999000.

The previous prime is 90748633. The next prime is 90748649. The reversal of 90748647 is 74684709.

It is not a de Polignac number, because 90748647 - 2¹¹ = 90746599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90748649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152479 + ... + 153072.

It is an arithmetic number, because the mean of its divisors is an integer number (9166560).

Almost surely, 2^90748647 is an apocalyptic number.

90748647 is a deficient number, since it is larger than the sum of its proper divisors (55916313).

90748647 is a wasteful number, since it uses less digits than its factorization.

90748647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305571 (or 305565 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 90748647 is about 9526.2084272810. The cubic root of 90748647 is about 449.3796340510.

The spelling of 90748647 in words is "ninety million, seven hundred forty-eight thousand, six hundred forty-seven".