90098551 has 4 divisors (see below), whose sum is σ = 94840600. Its totient is φ = 85356504.

The previous prime is 90098543. The next prime is 90098581. The reversal of 90098551 is 15589009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15589009 = 23 ⋅677783.

It is a cyclic number.

It is not a de Polignac number, because 90098551 - 2³ = 90098543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90098551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90098501) 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, 2370996 + ... + 2371033.

It is an arithmetic number, because the mean of its divisors is an integer number (23710150).

Almost surely, 2^90098551 is an apocalyptic number.

90098551 is a deficient number, since it is larger than the sum of its proper divisors (4742049).

90098551 is a wasteful number, since it uses less digits than its factorization.

90098551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742048.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 90098551 is about 9492.0256531470. The cubic root of 90098551 is about 448.3039879203.

The spelling of 90098551 in words is "ninety million, ninety-eight thousand, five hundred fifty-one".