15673961 has 2 divisors, whose sum is σ = 15673962. Its totient is φ = 15673960.

The previous prime is 15673943. The next prime is 15673963. The reversal of 15673961 is 16937651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 24025 = 3956^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 15673961 - 2⁶ = 15673897 is a prime.

Together with 15673963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15673963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7836980 + 7836981.

It is an arithmetic number, because the mean of its divisors is an integer number (7836981).

Almost surely, 2^15673961 is an apocalyptic number.

It is an amenable number.

15673961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15673961 is an equidigital number, since it uses as much as digits as its factorization.

15673961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 15673961 is about 3959.0353623073. The cubic root of 15673961 is about 250.2608530614.

The spelling of 15673961 in words is "fifteen million, six hundred seventy-three thousand, nine hundred sixty-one".