83191661923 has 2 divisors, whose sum is σ = 83191661924. Its totient is φ = 83191661922.

The previous prime is 83191661893. The next prime is 83191661933. The reversal of 83191661923 is 32916619138.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83191661923 - 2¹³ = 83191653731 is a prime.

It is a super-2 number, since 2×83191661923² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83191661933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41595830961 + 41595830962.

It is an arithmetic number, because the mean of its divisors is an integer number (41595830962).

Almost surely, 2^83191661923 is an apocalyptic number.

83191661923 is a deficient number, since it is larger than the sum of its proper divisors (1).

83191661923 is an equidigital number, since it uses as much as digits as its factorization.

83191661923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The spelling of 83191661923 in words is "eighty-three billion, one hundred ninety-one million, six hundred sixty-one thousand, nine hundred twenty-three".