249877697 has 2 divisors, whose sum is σ = 249877698. Its totient is φ = 249877696.

The previous prime is 249877631. The next prime is 249877699. The reversal of 249877697 is 796778942.

249877697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144384256 + 105493441 = 12016^2 + 10271^2 .

It is a cyclic number.

It is not a de Polignac number, because 249877697 - 2²⁰ = 248829121 is a prime.

Together with 249877699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249877699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124938848 + 124938849.

It is an arithmetic number, because the mean of its divisors is an integer number (124938849).

Almost surely, 2^249877697 is an apocalyptic number.

It is an amenable number.

249877697 is a deficient number, since it is larger than the sum of its proper divisors (1).

249877697 is an equidigital number, since it uses as much as digits as its factorization.

249877697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 59.

The square root of 249877697 is about 15807.5202672652. The cubic root of 249877697 is about 629.8577801082.

The spelling of 249877697 in words is "two hundred forty-nine million, eight hundred seventy-seven thousand, six hundred ninety-seven".