2631949 has 2 divisors, whose sum is σ = 2631950. Its totient is φ = 2631948.

The previous prime is 2631947. The next prime is 2631971. The reversal of 2631949 is 9491362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 915849 = 1310^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2631949 - 2¹ = 2631947 is a prime.

Together with 2631947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2631947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315974 + 1315975.

It is an arithmetic number, because the mean of its divisors is an integer number (1315975).

2^2631949 is an apocalyptic number.

It is an amenable number.

2631949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2631949 is an equidigital number, since it uses as much as digits as its factorization.

2631949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 2631949 is about 1622.3282651794. The cubic root of 2631949 is about 138.0678270510.

The spelling of 2631949 in words is "two million, six hundred thirty-one thousand, nine hundred forty-nine".