990061892 has 6 divisors (see below), whose sum is σ = 1732608318. Its totient is φ = 495030944.

The previous prime is 990061883. The next prime is 990061907. The reversal of 990061892 is 298160099.

It can be written as a sum of positive squares in only one way, i.e., 955675396 + 34386496 = 30914^2 + 5864^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123757733 + ... + 123757740.

It is an arithmetic number, because the mean of its divisors is an integer number (288768053).

Almost surely, 2^990061892 is an apocalyptic number.

It is an amenable number.

990061892 is a deficient number, since it is larger than the sum of its proper divisors (742546426).

990061892 is a wasteful number, since it uses less digits than its factorization.

990061892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247515477 (or 247515475 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 990061892 is about 31465.2489581761. The cubic root of 990061892 is about 996.6762623407.

The spelling of 990061892 in words is "nine hundred ninety million, sixty-one thousand, eight hundred ninety-two".