997775130 has 32 divisors (see below), whose sum is σ = 2612357568. Its totient is φ = 241884800.

The previous prime is 997775123. The next prime is 997775143. The reversal of 997775130 is 31577799.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 997775130.

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, 1511451 + ... + 1512110.

It is an arithmetic number, because the mean of its divisors is an integer number (81636174).

Almost surely, 2^997775130 is an apocalyptic number.

997775130 is an abundant number, since it is smaller than the sum of its proper divisors (1614582438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997775130 is a wasteful number, since it uses less digits than its factorization.

997775130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023582.

The product of its (nonzero) digits is 416745, while the sum is 48.

The square root of 997775130 is about 31587.5787296209. The cubic root of 997775130 is about 999.2578259807.

It can be divided in two parts, 99777 and 5130, that multiplied together give a triangular number (511856010 = T₃₁₉₉₅).

The spelling of 997775130 in words is "nine hundred ninety-seven million, seven hundred seventy-five thousand, one hundred thirty".