997209092 has 24 divisors (see below), whose sum is σ = 1910284992. Its totient is φ = 451724000.

The previous prime is 997209071. The next prime is 997209131. The reversal of 997209092 is 290902799.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25784 + ... + 51567.

It is an arithmetic number, because the mean of its divisors is an integer number (79595208).

Almost surely, 2^997209092 is an apocalyptic number.

997209092 is the 25784-th pentagonal number.

It is an amenable number.

997209092 is a deficient number, since it is larger than the sum of its proper divisors (913075900).

997209092 is a wasteful number, since it uses less digits than its factorization.

997209092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77659 (or 77657 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 997209092 is about 31578.6176391558. The cubic root of 997209092 is about 999.0688305259.

The spelling of 997209092 in words is "nine hundred ninety-seven million, two hundred nine thousand, ninety-two".