90451799 has 12 divisors (see below), whose sum is σ = 96834960. Its totient is φ = 84460320.

The previous prime is 90451793. The next prime is 90451807. The reversal of 90451799 is 99715409.

It is not a de Polignac number, because 90451799 - 2¹² = 90447703 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 (90451793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23867 + ... + 27395.

It is an arithmetic number, because the mean of its divisors is an integer number (8069580).

Almost surely, 2^90451799 is an apocalyptic number.

90451799 is a deficient number, since it is larger than the sum of its proper divisors (6383161).

90451799 is a wasteful number, since it uses less digits than its factorization.

90451799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3619 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 90451799 is about 9510.6150694895. The cubic root of 90451799 is about 448.8891100703.

The spelling of 90451799 in words is "ninety million, four hundred fifty-one thousand, seven hundred ninety-nine".