90797287 has 4 divisors (see below), whose sum is σ = 103768336. Its totient is φ = 77826240.

The previous prime is 90797251. The next prime is 90797293. The reversal of 90797287 is 78279709.

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 90797287 - 2¹¹ = 90795239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90797287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90797207) 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, 6485514 + ... + 6485527.

It is an arithmetic number, because the mean of its divisors is an integer number (25942084).

Almost surely, 2^90797287 is an apocalyptic number.

90797287 is a deficient number, since it is larger than the sum of its proper divisors (12971049).

90797287 is a wasteful number, since it uses less digits than its factorization.

90797287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971048.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 90797287 is about 9528.7610422342. The cubic root of 90797287 is about 449.4599067681.

The spelling of 90797287 in words is "ninety million, seven hundred ninety-seven thousand, two hundred eighty-seven".