90261619 has 8 divisors (see below), whose sum is σ = 109224288. Its totient is φ = 72816000.

The previous prime is 90261607. The next prime is 90261649. The reversal of 90261619 is 91616209.

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 90261619 - 2⁹ = 90261107 is a prime.

It is a super-2 number, since 2×90261619² = 16294319729002322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90261649) 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, 379132 + ... + 379369.

It is an arithmetic number, because the mean of its divisors is an integer number (13653036).

Almost surely, 2^90261619 is an apocalyptic number.

90261619 is a deficient number, since it is larger than the sum of its proper divisors (18962669).

90261619 is a wasteful number, since it uses less digits than its factorization.

90261619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758525.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 90261619 is about 9500.6115066347. The cubic root of 90261619 is about 448.5742844452.

The spelling of 90261619 in words is "ninety million, two hundred sixty-one thousand, six hundred nineteen".