999994972 has 6 divisors (see below), whose sum is σ = 1749991208. Its totient is φ = 499997484.

The previous prime is 999994951. The next prime is 999994973. The reversal of 999994972 is 279499999.

It is a junction number, because it is equal to n+sod(n) for n = 999994898 and 999994907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999994973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124999368 + ... + 124999375.

Almost surely, 2^999994972 is an apocalyptic number.

It is an amenable number.

999994972 is a deficient number, since it is larger than the sum of its proper divisors (749996236).

999994972 is a wasteful number, since it uses less digits than its factorization.

999994972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249998747 (or 249998745 counting only the distinct ones).

The product of its digits is 29760696, while the sum is 67.

The square root of 999994972 is about 31622.6971019235. The cubic root of 999994972 is about 999.9983239972.

The spelling of 999994972 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, nine hundred seventy-two".