90370551 has 4 divisors (see below), whose sum is σ = 120494072. Its totient is φ = 60247032.

The previous prime is 90370537. The next prime is 90370559. The reversal of 90370551 is 15507309.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15507309 = 3 ⋅5169103.

It is not a de Polignac number, because 90370551 - 2⁹ = 90370039 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 (90370559) 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 3 ways as a sum of consecutive naturals, for example, 15061756 + ... + 15061761.

It is an arithmetic number, because the mean of its divisors is an integer number (30123518).

Almost surely, 2^90370551 is an apocalyptic number.

90370551 is a deficient number, since it is larger than the sum of its proper divisors (30123521).

90370551 is a wasteful number, since it uses less digits than its factorization.

90370551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30123520.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 90370551 is about 9506.3426721321. The cubic root of 90370551 is about 448.7546654698.

The spelling of 90370551 in words is "ninety million, three hundred seventy thousand, five hundred fifty-one".