1385268637 has 2 divisors, whose sum is σ = 1385268638. Its totient is φ = 1385268636.

The previous prime is 1385268601. The next prime is 1385268667. The reversal of 1385268637 is 7368625831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144739556 + 240529081 = 33834^2 + 15509^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385268637 - 2⁷ = 1385268509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385268667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692634318 + 692634319.

It is an arithmetic number, because the mean of its divisors is an integer number (692634319).

Almost surely, 2^1385268637 is an apocalyptic number.

It is an amenable number.

1385268637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385268637 is an equidigital number, since it uses as much as digits as its factorization.

1385268637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 1385268637 is about 37219.1971568437. The cubic root of 1385268637 is about 1114.7513336088.

The spelling of 1385268637 in words is "one billion, three hundred eighty-five million, two hundred sixty-eight thousand, six hundred thirty-seven".