23891407 has 2 divisors, whose sum is σ = 23891408. Its totient is φ = 23891406.

The previous prime is 23891353. The next prime is 23891423. The reversal of 23891407 is 70419832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23891407 - 2⁷ = 23891279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23891437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11945703 + 11945704.

It is an arithmetic number, because the mean of its divisors is an integer number (11945704).

Almost surely, 2^23891407 is an apocalyptic number.

23891407 is a deficient number, since it is larger than the sum of its proper divisors (1).

23891407 is an equidigital number, since it uses as much as digits as its factorization.

23891407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 23891407 is about 4887.8836933790. The cubic root of 23891407 is about 288.0142056715.

The spelling of 23891407 in words is "twenty-three million, eight hundred ninety-one thousand, four hundred seven".