90197605 has 8 divisors (see below), whose sum is σ = 112943232. Its totient is φ = 69020688.

The previous prime is 90197587. The next prime is 90197621. The reversal of 90197605 is 50679109.

90197605 = 828² + 829² + ... + 942².

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 90197605 - 2²³ = 81808997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392049 + ... + 392278.

It is an arithmetic number, because the mean of its divisors is an integer number (14117904).

Almost surely, 2^90197605 is an apocalyptic number.

It is an amenable number.

90197605 is a deficient number, since it is larger than the sum of its proper divisors (22745627).

90197605 is a wasteful number, since it uses less digits than its factorization.

90197605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784355.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 90197605 is about 9497.2419680663. The cubic root of 90197605 is about 448.4682156439.

The spelling of 90197605 in words is "ninety million, one hundred ninety-seven thousand, six hundred five".