197015678999 has 2 divisors, whose sum is σ = 197015679000. Its totient is φ = 197015678998.

The previous prime is 197015678927. The next prime is 197015679017. The reversal of 197015678999 is 999876510791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197015678999 - 2²⁸ = 196747243543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197015672999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98507839499 + 98507839500.

It is an arithmetic number, because the mean of its divisors is an integer number (98507839500).

Almost surely, 2^197015678999 is an apocalyptic number.

197015678999 is a deficient number, since it is larger than the sum of its proper divisors (1).

197015678999 is an equidigital number, since it uses as much as digits as its factorization.

197015678999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77157360, while the sum is 71.

The spelling of 197015678999 in words is "one hundred ninety-seven billion, fifteen million, six hundred seventy-eight thousand, nine hundred ninety-nine".