2156699 has 2 divisors, whose sum is σ = 2156700. Its totient is φ = 2156698.

The previous prime is 2156683. The next prime is 2156711. The reversal of 2156699 is 9966512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156699 - 2⁴ = 2156683 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078349 + 1078350.

It is an arithmetic number, because the mean of its divisors is an integer number (1078350).

2^2156699 is an apocalyptic number.

2156699 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156699 is an equidigital number, since it uses as much as digits as its factorization.

2156699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 2156699 is about 1468.5703932737. The cubic root of 2156699 is about 129.2001979312.

The spelling of 2156699 in words is "two million, one hundred fifty-six thousand, six hundred ninety-nine".