249970379 has 2 divisors, whose sum is σ = 249970380. Its totient is φ = 249970378.

The previous prime is 249970321. The next prime is 249970381. The reversal of 249970379 is 973079942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249970379 - 2¹⁶ = 249904843 is a prime.

Together with 249970381, 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 (249970579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124985189 + 124985190.

It is an arithmetic number, because the mean of its divisors is an integer number (124985190).

Almost surely, 2^249970379 is an apocalyptic number.

249970379 is a deficient number, since it is larger than the sum of its proper divisors (1).

249970379 is an equidigital number, since it uses as much as digits as its factorization.

249970379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 249970379 is about 15810.4515748286. The cubic root of 249970379 is about 629.9356438838.

The spelling of 249970379 in words is "two hundred forty-nine million, nine hundred seventy thousand, three hundred seventy-nine".