1397306237 has 2 divisors, whose sum is σ = 1397306238. Its totient is φ = 1397306236.

The previous prime is 1397306167. The next prime is 1397306249. The reversal of 1397306237 is 7326037931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306027321 + 91278916 = 36139^2 + 9554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397306237 - 2⁸ = 1397305981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1397306194 and 1397306203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397300237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698653118 + 698653119.

It is an arithmetic number, because the mean of its divisors is an integer number (698653119).

Almost surely, 2^1397306237 is an apocalyptic number.

It is an amenable number.

1397306237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397306237 is an equidigital number, since it uses as much as digits as its factorization.

1397306237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 1397306237 is about 37380.5596132535. The cubic root of 1397306237 is about 1117.9709854830.

The spelling of 1397306237 in words is "one billion, three hundred ninety-seven million, three hundred six thousand, two hundred thirty-seven".