97791899 has 2 divisors, whose sum is σ = 97791900. Its totient is φ = 97791898.

The previous prime is 97791839. The next prime is 97791907. The reversal of 97791899 is 99819779.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99819779) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97791899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97791839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48895949 + 48895950.

It is an arithmetic number, because the mean of its divisors is an integer number (48895950).

Almost surely, 2^97791899 is an apocalyptic number.

97791899 is a deficient number, since it is larger than the sum of its proper divisors (1).

97791899 is an equidigital number, since it uses as much as digits as its factorization.

97791899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 59.

The square root of 97791899 is about 9888.9786631381. The cubic root of 97791899 is about 460.7170590291.

The spelling of 97791899 in words is "ninety-seven million, seven hundred ninety-one thousand, eight hundred ninety-nine".