90641287 has 8 divisors (see below), whose sum is σ = 100558080. Its totient is φ = 81003960.

The previous prime is 90641251. The next prime is 90641323. The reversal of 90641287 is 78214609.

It is an interprime number because it is at equal distance from previous prime (90641251) and next prime (90641323).

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 90641287 - 2¹⁵ = 90608519 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 (90641387) 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, 69183 + ... + 70480.

It is an arithmetic number, because the mean of its divisors is an integer number (12569760).

Almost surely, 2^90641287 is an apocalyptic number.

90641287 is a deficient number, since it is larger than the sum of its proper divisors (9916793).

90641287 is a wasteful number, since it uses less digits than its factorization.

90641287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139733.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 90641287 is about 9520.5717790477. The cubic root of 90641287 is about 449.2023515711.

The spelling of 90641287 in words is "ninety million, six hundred forty-one thousand, two hundred eighty-seven".