249475619 has 2 divisors, whose sum is σ = 249475620. Its totient is φ = 249475618.

The previous prime is 249475607. The next prime is 249475649. The reversal of 249475619 is 916574942.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249475619 is a prime.

It is a super-2 number, since 2×249475619² = 124476168950866322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249475649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124737809 + 124737810.

It is an arithmetic number, because the mean of its divisors is an integer number (124737810).

Almost surely, 2^249475619 is an apocalyptic number.

249475619 is a deficient number, since it is larger than the sum of its proper divisors (1).

249475619 is an equidigital number, since it uses as much as digits as its factorization.

249475619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 249475619 is about 15794.7972130066. The cubic root of 249475619 is about 629.5197641948.

The spelling of 249475619 in words is "two hundred forty-nine million, four hundred seventy-five thousand, six hundred nineteen".