1397101249 has 2 divisors, whose sum is σ = 1397101250. Its totient is φ = 1397101248.

The previous prime is 1397101231. The next prime is 1397101283. The reversal of 1397101249 is 9421017931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1391663025 + 5438224 = 37305^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397101249 - 2¹⁷ = 1396970177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397101049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698550624 + 698550625.

It is an arithmetic number, because the mean of its divisors is an integer number (698550625).

Almost surely, 2^1397101249 is an apocalyptic number.

It is an amenable number.

1397101249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397101249 is an equidigital number, since it uses as much as digits as its factorization.

1397101249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1397101249 is about 37377.8176061685. The cubic root of 1397101249 is about 1117.9163131814.

The spelling of 1397101249 in words is "one billion, three hundred ninety-seven million, one hundred one thousand, two hundred forty-nine".