999457505 has 16 divisors (see below), whose sum is σ = 1234384704. Its totient is φ = 776301120.

The previous prime is 999457499. The next prime is 999457549. The reversal of 999457505 is 505754999.

It is a happy number.

It is not a de Polignac number, because 999457505 - 2⁶ = 999457441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85334 + ... + 96336.

It is an arithmetic number, because the mean of its divisors is an integer number (77149044).

Almost surely, 2^999457505 is an apocalyptic number.

It is an amenable number.

999457505 is a deficient number, since it is larger than the sum of its proper divisors (234927199).

999457505 is a wasteful number, since it uses less digits than its factorization.

999457505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11536.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The square root of 999457505 is about 31614.1978389457. The cubic root of 999457505 is about 999.8191356234.

The spelling of 999457505 in words is "nine hundred ninety-nine million, four hundred fifty-seven thousand, five hundred five".