23421961 has 2 divisors, whose sum is σ = 23421962. Its totient is φ = 23421960.

The previous prime is 23421899. The next prime is 23421989. The reversal of 23421961 is 16912432.

It is an a-pointer prime, because the next prime (23421989) can be obtained adding 23421961 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 3171961 = 4500^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 23421961 - 2²³ = 15033353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23428961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710980 + 11710981.

It is an arithmetic number, because the mean of its divisors is an integer number (11710981).

Almost surely, 2^23421961 is an apocalyptic number.

It is an amenable number.

23421961 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421961 is an equidigital number, since it uses as much as digits as its factorization.

23421961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 23421961 is about 4839.6240556473. The cubic root of 23421961 is about 286.1153014485.

The spelling of 23421961 in words is "twenty-three million, four hundred twenty-one thousand, nine hundred sixty-one".