900990451 has 4 divisors (see below), whose sum is σ = 908084992. Its totient is φ = 893895912.

The previous prime is 900990449. The next prime is 900990491. The reversal of 900990451 is 154099009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 900990451 - 2¹ = 900990449 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 900990451.

It is not an unprimeable number, because it can be changed into a prime (900990491) 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, 3547080 + ... + 3547333.

It is an arithmetic number, because the mean of its divisors is an integer number (227021248).

Almost surely, 2^900990451 is an apocalyptic number.

900990451 is a deficient number, since it is larger than the sum of its proper divisors (7094541).

900990451 is a wasteful number, since it uses less digits than its factorization.

900990451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094540.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 900990451 is about 30016.5029775289. The cubic root of 900990451 is about 965.8434288089.

The spelling of 900990451 in words is "nine hundred million, nine hundred ninety thousand, four hundred fifty-one".