1248866947 has 2 divisors, whose sum is σ = 1248866948. Its totient is φ = 1248866946.

The previous prime is 1248866923. The next prime is 1248866951. The reversal of 1248866947 is 7496688421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248866947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1248866917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624433473 + 624433474.

It is an arithmetic number, because the mean of its divisors is an integer number (624433474).

Almost surely, 2^1248866947 is an apocalyptic number.

1248866947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248866947 is an equidigital number, since it uses as much as digits as its factorization.

1248866947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 1248866947 is about 35339.3116373254. The cubic root of 1248866947 is about 1076.8917681320.

The spelling of 1248866947 in words is "one billion, two hundred forty-eight million, eight hundred sixty-six thousand, nine hundred forty-seven".