1237491949 has 2 divisors, whose sum is σ = 1237491950. Its totient is φ = 1237491948.

The previous prime is 1237491887. The next prime is 1237492013. The reversal of 1237491949 is 9491947321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827712900 + 409779049 = 28770^2 + 20243^2 .

It is an emirp because it is prime and its reverse (9491947321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1237491949 - 2¹⁹ = 1236967661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1237491049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618745974 + 618745975.

It is an arithmetic number, because the mean of its divisors is an integer number (618745975).

Almost surely, 2^1237491949 is an apocalyptic number.

It is an amenable number.

1237491949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237491949 is an equidigital number, since it uses as much as digits as its factorization.

1237491949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 1237491949 is about 35178.0037665584. The cubic root of 1237491949 is about 1073.6122562429.

The spelling of 1237491949 in words is "one billion, two hundred thirty-seven million, four hundred ninety-one thousand, nine hundred forty-nine".