90417587 has 8 divisors (see below), whose sum is σ = 99748320. Its totient is φ = 81426240.

The previous prime is 90417557. The next prime is 90417601. The reversal of 90417587 is 78571409.

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 90417587 - 2¹⁰ = 90416563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90417517) 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, 84287 + ... + 85352.

It is an arithmetic number, because the mean of its divisors is an integer number (12468540).

Almost surely, 2^90417587 is an apocalyptic number.

90417587 is a deficient number, since it is larger than the sum of its proper divisors (9330733).

90417587 is a wasteful number, since it uses less digits than its factorization.

90417587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169693.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 90417587 is about 9508.8162775395. The cubic root of 90417587 is about 448.8325078025.

Adding to 90417587 its sum of digits (41), we get a triangular number (90417628 = T₁₃₄₄₇).

The spelling of 90417587 in words is "ninety million, four hundred seventeen thousand, five hundred eighty-seven".