2731961 has 2 divisors, whose sum is σ = 2731962. Its totient is φ = 2731960.

The previous prime is 2731933. The next prime is 2731979. The reversal of 2731961 is 1691372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1771561 + 960400 = 1331^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2731961 is a prime.

It is a super-2 number, since 2×2731961² = 14927221811042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2731901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365980 + 1365981.

It is an arithmetic number, because the mean of its divisors is an integer number (1365981).

2^2731961 is an apocalyptic number.

It is an amenable number.

2731961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731961 is an equidigital number, since it uses as much as digits as its factorization.

2731961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 2731961 is about 1652.8644832532. The cubic root of 2731961 is about 139.7949549381.

The spelling of 2731961 in words is "two million, seven hundred thirty-one thousand, nine hundred sixty-one".