249377213 has 2 divisors, whose sum is σ = 249377214. Its totient is φ = 249377212.

The previous prime is 249377189. The next prime is 249377231. The reversal of 249377213 is 312773942.

Together with next prime (249377231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139169209 + 110208004 = 11797^2 + 10498^2 .

It is a cyclic number.

It is not a de Polignac number, because 249377213 - 2¹⁶ = 249311677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249377273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124688606 + 124688607.

It is an arithmetic number, because the mean of its divisors is an integer number (124688607).

Almost surely, 2^249377213 is an apocalyptic number.

It is an amenable number.

249377213 is a deficient number, since it is larger than the sum of its proper divisors (1).

249377213 is an equidigital number, since it uses as much as digits as its factorization.

249377213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 249377213 is about 15791.6817660438. The cubic root of 249377213 is about 629.4369816646.

The spelling of 249377213 in words is "two hundred forty-nine million, three hundred seventy-seven thousand, two hundred thirteen".