997212699 has 24 divisors (see below), whose sum is σ = 1684480512. Its totient is φ = 556582320.

The previous prime is 997212691. The next prime is 997212703. The reversal of 997212699 is 996212799.

It is not a de Polignac number, because 997212699 - 2³ = 997212691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997212691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181347 + ... + 186764.

It is an arithmetic number, because the mean of its divisors is an integer number (70186688).

Almost surely, 2^997212699 is an apocalyptic number.

997212699 is a deficient number, since it is larger than the sum of its proper divisors (687267813).

997212699 is a wasteful number, since it uses less digits than its factorization.

997212699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368167 (or 368164 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 997212699 is about 31578.6747505338. The cubic root of 997212699 is about 999.0700351000.

The spelling of 997212699 in words is "nine hundred ninety-seven million, two hundred twelve thousand, six hundred ninety-nine".