249667069 has 2 divisors, whose sum is σ = 249667070. Its totient is φ = 249667068.

The previous prime is 249667057. The next prime is 249667091. The reversal of 249667069 is 960766942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248692900 + 974169 = 15770^2 + 987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249667069 is a prime.

It is a super-2 number, since 2×249667069² = 124667290686101522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249667469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124833534 + 124833535.

It is an arithmetic number, because the mean of its divisors is an integer number (124833535).

Almost surely, 2^249667069 is an apocalyptic number.

It is an amenable number.

249667069 is a deficient number, since it is larger than the sum of its proper divisors (1).

249667069 is an equidigital number, since it uses as much as digits as its factorization.

249667069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 249667069 is about 15800.8565907042. The cubic root of 249667069 is about 629.6807562024.

The spelling of 249667069 in words is "two hundred forty-nine million, six hundred sixty-seven thousand, sixty-nine".