247249049 has 2 divisors, whose sum is σ = 247249050. Its totient is φ = 247249048.

The previous prime is 247249039. The next prime is 247249063. The reversal of 247249049 is 940942742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239785225 + 7463824 = 15485^2 + 2732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247249049 is a prime.

It is a super-2 number, since 2×247249049² = 122264184462808802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247248997 and 247249015.

It is not a weakly prime, because it can be changed into another prime (247249039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123624524 + 123624525.

It is an arithmetic number, because the mean of its divisors is an integer number (123624525).

Almost surely, 2^247249049 is an apocalyptic number.

It is an amenable number.

247249049 is a deficient number, since it is larger than the sum of its proper divisors (1).

247249049 is an equidigital number, since it uses as much as digits as its factorization.

247249049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 247249049 is about 15724.1549534466. The cubic root of 247249049 is about 627.6413433765.

The spelling of 247249049 in words is "two hundred forty-seven million, two hundred forty-nine thousand, forty-nine".