997079144 has 8 divisors (see below), whose sum is σ = 1869523410. Its totient is φ = 498539568.

The previous prime is 997079143. The next prime is 997079191. The reversal of 997079144 is 441970799.

It can be written as a sum of positive squares in only one way, i.e., 885776644 + 111302500 = 29762^2 + 10550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 997079092 and 997079101.

It is not an unprimeable number, because it can be changed into a prime (997079143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62317439 + ... + 62317454.

Almost surely, 2^997079144 is an apocalyptic number.

It is an amenable number.

997079144 is a deficient number, since it is larger than the sum of its proper divisors (872444266).

997079144 is a wasteful number, since it uses less digits than its factorization.

997079144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124634899 (or 124634895 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 997079144 is about 31576.5600406377. The cubic root of 997079144 is about 999.0254318588.

The spelling of 997079144 in words is "nine hundred ninety-seven million, seventy-nine thousand, one hundred forty-four".