990425455 has 4 divisors (see below), whose sum is σ = 1188510552. Its totient is φ = 792340360.

The previous prime is 990425453. The next prime is 990425461. The reversal of 990425455 is 554524099.

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

It is not a de Polignac number, because 990425455 - 2¹ = 990425453 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 (990425453) 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, 99042541 + ... + 99042550.

It is an arithmetic number, because the mean of its divisors is an integer number (297127638).

Almost surely, 2^990425455 is an apocalyptic number.

990425455 is a deficient number, since it is larger than the sum of its proper divisors (198085097).

990425455 is a wasteful number, since it uses less digits than its factorization.

990425455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198085096.

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 990425455 is about 31471.0256426447. The cubic root of 990425455 is about 996.7982447037.

The spelling of 990425455 in words is "nine hundred ninety million, four hundred twenty-five thousand, four hundred fifty-five".