247498913 has 2 divisors, whose sum is σ = 247498914. Its totient is φ = 247498912.

The previous prime is 247498873. The next prime is 247498949. The reversal of 247498913 is 319894742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229461904 + 18037009 = 15148^2 + 4247^2 .

It is a cyclic number.

It is not a de Polignac number, because 247498913 - 2¹⁰ = 247497889 is a prime.

It is a super-2 number, since 2×247498913² = 122511423872363138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247498973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123749456 + 123749457.

It is an arithmetic number, because the mean of its divisors is an integer number (123749457).

Almost surely, 2^247498913 is an apocalyptic number.

It is an amenable number.

247498913 is a deficient number, since it is larger than the sum of its proper divisors (1).

247498913 is an equidigital number, since it uses as much as digits as its factorization.

247498913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 247498913 is about 15732.0981753865. The cubic root of 247498913 is about 627.8526986598.

The spelling of 247498913 in words is "two hundred forty-seven million, four hundred ninety-eight thousand, nine hundred thirteen".