997619107 has 2 divisors, whose sum is σ = 997619108. Its totient is φ = 997619106.

The previous prime is 997619087. The next prime is 997619171. The reversal of 997619107 is 701916799.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997619107 - 2²³ = 989230499 is a prime.

It is not a weakly prime, because it can be changed into another prime (997619507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498809553 + 498809554.

It is an arithmetic number, because the mean of its divisors is an integer number (498809554).

Almost surely, 2^997619107 is an apocalyptic number.

997619107 is a deficient number, since it is larger than the sum of its proper divisors (1).

997619107 is an equidigital number, since it uses as much as digits as its factorization.

997619107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326, while the sum is 49.

The square root of 997619107 is about 31585.1089439312. The cubic root of 997619107 is about 999.2057383154.

The spelling of 997619107 in words is "nine hundred ninety-seven million, six hundred nineteen thousand, one hundred seven".