997149132 has 36 divisors (see below), whose sum is σ = 2880653776. Its totient is φ = 284899680.

The previous prime is 997149073. The next prime is 997149163. The reversal of 997149132 is 231941799.

997149132 is a `hidden beast` number, since 99 + 71 + 491 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×997149132³ (a number of 28 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1978219 + ... + 1978722.

Almost surely, 2^997149132 is an apocalyptic number.

It is an amenable number.

997149132 is an abundant number, since it is smaller than the sum of its proper divisors (1883504644).

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

997149132 is a wasteful number, since it uses less digits than its factorization.

997149132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956958 (or 3956953 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 997149132 is about 31577.6682483048. The cubic root of 997149132 is about 999.0488061839.

The spelling of 997149132 in words is "nine hundred ninety-seven million, one hundred forty-nine thousand, one hundred thirty-two".