90137149 has 4 divisors (see below), whose sum is σ = 90185760. Its totient is φ = 90088540.

The previous prime is 90137141. The next prime is 90137167. The reversal of 90137149 is 94173109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90137149 - 2³ = 90137141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90137141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21409 + ... + 25270.

It is an arithmetic number, because the mean of its divisors is an integer number (22546440).

Almost surely, 2^90137149 is an apocalyptic number.

It is an amenable number.

90137149 is a deficient number, since it is larger than the sum of its proper divisors (48611).

90137149 is a wasteful number, since it uses less digits than its factorization.

90137149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48610.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 90137149 is about 9494.0586157870. The cubic root of 90137149 is about 448.3679962267.

The spelling of 90137149 in words is "ninety million, one hundred thirty-seven thousand, one hundred forty-nine".