90149691 has 8 divisors (see below), whose sum is σ = 127270224. Its totient is φ = 56564480.

The previous prime is 90149681. The next prime is 90149729. The reversal of 90149691 is 19694109.

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 90149691 - 2⁵ = 90149659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90149641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883770 + ... + 883871.

It is an arithmetic number, because the mean of its divisors is an integer number (15908778).

Almost surely, 2^90149691 is an apocalyptic number.

90149691 is a deficient number, since it is larger than the sum of its proper divisors (37120533).

90149691 is a wasteful number, since it uses less digits than its factorization.

90149691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767661.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 90149691 is about 9494.7191111691. The cubic root of 90149691 is about 448.3887910957.

The spelling of 90149691 in words is "ninety million, one hundred forty-nine thousand, six hundred ninety-one".