90668019 has 32 divisors (see below), whose sum is σ = 140788480. Its totient is φ = 51414912.

The previous prime is 90667999. The next prime is 90668033. The reversal of 90668019 is 91086609.

It is not a de Polignac number, because 90668019 - 2⁸ = 90667763 is a prime.

It is a super-2 number, since 2×90668019² = 16441379338768722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (90668059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25764 + ... + 29070.

It is an arithmetic number, because the mean of its divisors is an integer number (4399640).

Almost surely, 2^90668019 is an apocalyptic number.

90668019 is a deficient number, since it is larger than the sum of its proper divisors (50120461).

90668019 is a wasteful number, since it uses less digits than its factorization.

90668019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 90668019 is about 9521.9755828294. The cubic root of 90668019 is about 449.2465069348.

The spelling of 90668019 in words is "ninety million, six hundred sixty-eight thousand, nineteen".