1244671957 has 2 divisors, whose sum is σ = 1244671958. Its totient is φ = 1244671956.

The previous prime is 1244671951. The next prime is 1244672029. The reversal of 1244671957 is 7591764421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647651601 + 597020356 = 25449^2 + 24434^2 .

It is an emirp because it is prime and its reverse (7591764421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244671957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244671951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622335978 + 622335979.

It is an arithmetic number, because the mean of its divisors is an integer number (622335979).

Almost surely, 2^1244671957 is an apocalyptic number.

It is an amenable number.

1244671957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244671957 is an equidigital number, since it uses as much as digits as its factorization.

1244671957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 1244671957 is about 35279.9086875236. The cubic root of 1244671957 is about 1075.6846425116.

The spelling of 1244671957 in words is "one billion, two hundred forty-four million, six hundred seventy-one thousand, nine hundred fifty-seven".