23915217349 has 2 divisors, whose sum is σ = 23915217350. Its totient is φ = 23915217348.

The previous prime is 23915217307. The next prime is 23915217377. The reversal of 23915217349 is 94371251932.

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., 12317004324 + 11598213025 = 110982^2 + 107695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23915217349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23915217299 and 23915217308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23912217349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11957608674 + 11957608675.

It is an arithmetic number, because the mean of its divisors is an integer number (11957608675).

Almost surely, 2^23915217349 is an apocalyptic number.

It is an amenable number.

23915217349 is a deficient number, since it is larger than the sum of its proper divisors (1).

23915217349 is an equidigital number, since it uses as much as digits as its factorization.

23915217349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The spelling of 23915217349 in words is "twenty-three billion, nine hundred fifteen million, two hundred seventeen thousand, three hundred forty-nine".