997695667 has 2 divisors, whose sum is σ = 997695668. Its totient is φ = 997695666.

The previous prime is 997695653. The next prime is 997695683. The reversal of 997695667 is 766596799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997695667 - 2¹⁵ = 997662899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997695599 and 997695608.

It is not a weakly prime, because it can be changed into another prime (997695637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498847833 + 498847834.

It is an arithmetic number, because the mean of its divisors is an integer number (498847834).

Almost surely, 2^997695667 is an apocalyptic number.

997695667 is a deficient number, since it is larger than the sum of its proper divisors (1).

997695667 is an equidigital number, since it uses as much as digits as its factorization.

997695667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38578680, while the sum is 64.

The square root of 997695667 is about 31586.3208842056. The cubic root of 997695667 is about 999.2312982490.

The spelling of 997695667 in words is "nine hundred ninety-seven million, six hundred ninety-five thousand, six hundred sixty-seven".