109819597 has 2 divisors, whose sum is σ = 109819598. Its totient is φ = 109819596.

The previous prime is 109819561. The next prime is 109819613. The reversal of 109819597 is 795918901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109704676 + 114921 = 10474^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 109819597 - 2¹⁵ = 109786829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109819597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109819517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54909798 + 54909799.

It is an arithmetic number, because the mean of its divisors is an integer number (54909799).

Almost surely, 2^109819597 is an apocalyptic number.

It is an amenable number.

109819597 is a deficient number, since it is larger than the sum of its proper divisors (1).

109819597 is an equidigital number, since it uses as much as digits as its factorization.

109819597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 109819597 is about 10479.4845770200. The cubic root of 109819597 is about 478.8799070740.

The spelling of 109819597 in words is "one hundred nine million, eight hundred nineteen thousand, five hundred ninety-seven".