248861947 has 2 divisors, whose sum is σ = 248861948. Its totient is φ = 248861946.

The previous prime is 248861927. The next prime is 248861953. The reversal of 248861947 is 749168842.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 248861947 - 2⁷ = 248861819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 248861947.

It is not a weakly prime, because it can be changed into another prime (248861927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124430973 + 124430974.

It is an arithmetic number, because the mean of its divisors is an integer number (124430974).

Almost surely, 2^248861947 is an apocalyptic number.

248861947 is a deficient number, since it is larger than the sum of its proper divisors (1).

248861947 is an equidigital number, since it uses as much as digits as its factorization.

248861947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 248861947 is about 15775.3588548724. The cubic root of 248861947 is about 629.0031661541.

The spelling of 248861947 in words is "two hundred forty-eight million, eight hundred sixty-one thousand, nine hundred forty-seven".