90745089 has 8 divisors (see below), whose sum is σ = 125165760. Its totient is φ = 58410576.

The previous prime is 90745087. The next prime is 90745103. The reversal of 90745089 is 98054709.

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

It is not a de Polignac number, because 90745089 - 2¹ = 90745087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90745089.

It is not an unprimeable number, because it can be changed into a prime (90745087) 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, 521437 + ... + 521610.

It is an arithmetic number, because the mean of its divisors is an integer number (15645720).

Almost surely, 2^90745089 is an apocalyptic number.

It is an amenable number.

90745089 is a deficient number, since it is larger than the sum of its proper divisors (34420671).

90745089 is a wasteful number, since it uses less digits than its factorization.

90745089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043079.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 90745089 is about 9526.0216774895. The cubic root of 90745089 is about 449.3737610024.

The spelling of 90745089 in words is "ninety million, seven hundred forty-five thousand, eighty-nine".