90869247 has 24 divisors (see below), whose sum is σ = 150259200. Its totient is φ = 51837840.

The previous prime is 90869231. The next prime is 90869249. The reversal of 90869247 is 74296809.

It is a happy number.

It is not a de Polignac number, because 90869247 - 2⁴ = 90869231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90869249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64254 + ... + 65652.

It is an arithmetic number, because the mean of its divisors is an integer number (6260800).

Almost surely, 2^90869247 is an apocalyptic number.

90869247 is a deficient number, since it is larger than the sum of its proper divisors (59389953).

90869247 is a wasteful number, since it uses less digits than its factorization.

90869247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 90869247 is about 9532.5362312451. The cubic root of 90869247 is about 449.5786129371.

The spelling of 90869247 in words is "ninety million, eight hundred sixty-nine thousand, two hundred forty-seven".