997812465 has 16 divisors (see below), whose sum is σ = 1719307968. Its totient is φ = 491230656.

The previous prime is 997812461. The next prime is 997812479. The reversal of 997812465 is 564218799.

It is not a de Polignac number, because 997812465 - 2² = 997812461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (997812461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2558299 + ... + 2558688.

It is an arithmetic number, because the mean of its divisors is an integer number (107456748).

Almost surely, 2^997812465 is an apocalyptic number.

It is an amenable number.

997812465 is a deficient number, since it is larger than the sum of its proper divisors (721495503).

997812465 is a wasteful number, since it uses less digits than its factorization.

997812465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117008.

The product of its digits is 1088640, while the sum is 51.

The square root of 997812465 is about 31588.1697000633. The cubic root of 997812465 is about 999.2702893185.

The spelling of 997812465 in words is "nine hundred ninety-seven million, eight hundred twelve thousand, four hundred sixty-five".