997454307 has 4 divisors (see below), whose sum is σ = 1329939080. Its totient is φ = 664969536.

The previous prime is 997454299. The next prime is 997454309. The reversal of 997454307 is 703454799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 997454307 - 2³ = 997454299 is a prime.

It is the 31583-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997454309) by changing a digit.

It is a nontrivial repunit in base 31582.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166242382 + ... + 166242387.

It is an arithmetic number, because the mean of its divisors is an integer number (332484770).

Almost surely, 2^997454307 is an apocalyptic number.

997454307 is a deficient number, since it is larger than the sum of its proper divisors (332484773).

997454307 is a wasteful number, since it uses less digits than its factorization.

997454307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332484772.

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 997454307 is about 31582.5000118737. The cubic root of 997454307 is about 999.1507145851.

The spelling of 997454307 in words is "nine hundred ninety-seven million, four hundred fifty-four thousand, three hundred seven".