2209957 has 2 divisors, whose sum is σ = 2209958. Its totient is φ = 2209956.

The previous prime is 2209939. The next prime is 2209967. The reversal of 2209957 is 7599022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 224676 = 1409^2 + 474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2209957 is a prime.

2209957 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104978 + 1104979.

It is an arithmetic number, because the mean of its divisors is an integer number (1104979).

2^2209957 is an apocalyptic number.

It is an amenable number.

2209957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209957 is an equidigital number, since it uses as much as digits as its factorization.

2209957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 2209957 is about 1486.5924121964. The cubic root of 2209957 is about 130.2550613698.

It can be divided in two parts, 2 and 209957, that multiplied together give a palindrome (419914).

The spelling of 2209957 in words is "two million, two hundred nine thousand, nine hundred fifty-seven".