673261961 has 2 divisors, whose sum is σ = 673261962. Its totient is φ = 673261960.

The previous prime is 673261951. The next prime is 673261987. The reversal of 673261961 is 169162376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603439225 + 69822736 = 24565^2 + 8356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673261961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673261951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336630980 + 336630981.

It is an arithmetic number, because the mean of its divisors is an integer number (336630981).

Almost surely, 2^673261961 is an apocalyptic number.

It is an amenable number.

673261961 is a deficient number, since it is larger than the sum of its proper divisors (1).

673261961 is an equidigital number, since it uses as much as digits as its factorization.

673261961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 673261961 is about 25947.2919781622. The cubic root of 673261961 is about 876.4517770196.

The spelling of 673261961 in words is "six hundred seventy-three million, two hundred sixty-one thousand, nine hundred sixty-one".