23172119447 has 2 divisors, whose sum is σ = 23172119448. Its totient is φ = 23172119446.

The previous prime is 23172119431. The next prime is 23172119461. The reversal of 23172119447 is 74491127132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23172119447 - 2⁴ = 23172119431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23172119417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11586059723 + 11586059724.

It is an arithmetic number, because the mean of its divisors is an integer number (11586059724).

Almost surely, 2^23172119447 is an apocalyptic number.

23172119447 is a deficient number, since it is larger than the sum of its proper divisors (1).

23172119447 is an equidigital number, since it uses as much as digits as its factorization.

23172119447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The spelling of 23172119447 in words is "twenty-three billion, one hundred seventy-two million, one hundred nineteen thousand, four hundred forty-seven".