23991093389 has 2 divisors, whose sum is σ = 23991093390. Its totient is φ = 23991093388.

The previous prime is 23991093331. The next prime is 23991093403. The reversal of 23991093389 is 98339019932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19386385225 + 4604708164 = 139235^2 + 67858^2 .

It is a cyclic number.

It is not a de Polignac number, because 23991093389 - 2¹² = 23991089293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23991093089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11995546694 + 11995546695.

It is an arithmetic number, because the mean of its divisors is an integer number (11995546695).

Almost surely, 2^23991093389 is an apocalyptic number.

It is an amenable number.

23991093389 is a deficient number, since it is larger than the sum of its proper divisors (1).

23991093389 is an equidigital number, since it uses as much as digits as its factorization.

23991093389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 23991093389 in words is "twenty-three billion, nine hundred ninety-one million, ninety-three thousand, three hundred eighty-nine".