2637961 has 2 divisors, whose sum is σ = 2637962. Its totient is φ = 2637960.

The previous prime is 2637959. The next prime is 2637983. The reversal of 2637961 is 1697362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2190400 + 447561 = 1480^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2637961 - 2¹ = 2637959 is a prime.

Together with 2637959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2637911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318980 + 1318981.

It is an arithmetic number, because the mean of its divisors is an integer number (1318981).

2^2637961 is an apocalyptic number.

It is an amenable number.

2637961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2637961 is an equidigital number, since it uses as much as digits as its factorization.

2637961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 2637961 is about 1624.1801008509. The cubic root of 2637961 is about 138.1728737364.

The spelling of 2637961 in words is "two million, six hundred thirty-seven thousand, nine hundred sixty-one".