90137649 has 8 divisors (see below), whose sum is σ = 137352640. Its totient is φ = 51507216.

The previous prime is 90137629. The next prime is 90137651. The reversal of 90137649 is 94673109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90137649 - 2⁵ = 90137617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90137629) 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, 2146114 + ... + 2146155.

It is an arithmetic number, because the mean of its divisors is an integer number (17169080).

Almost surely, 2^90137649 is an apocalyptic number.

It is an amenable number.

90137649 is a deficient number, since it is larger than the sum of its proper divisors (47214991).

90137649 is a wasteful number, since it uses less digits than its factorization.

90137649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292279.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 90137649 is about 9494.0849480084. The cubic root of 90137649 is about 448.3688252729.

The spelling of 90137649 in words is "ninety million, one hundred thirty-seven thousand, six hundred forty-nine".