1385133739 has 16 divisors (see below), whose sum is σ = 1561489920. Its totient is φ = 1217604960.

The previous prime is 1385133733. The next prime is 1385133779. The reversal of 1385133739 is 9373315831.

It is not a de Polignac number, because 1385133739 - 2⁵ = 1385133707 is a prime.

It is a super-2 number, since 2×1385133739² = 3837190949832240242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1385133695 and 1385133704.

It is not an unprimeable number, because it can be changed into a prime (1385133733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55902 + ... + 76780.

It is an arithmetic number, because the mean of its divisors is an integer number (97593120).

Almost surely, 2^1385133739 is an apocalyptic number.

1385133739 is a deficient number, since it is larger than the sum of its proper divisors (176356181).

1385133739 is a wasteful number, since it uses less digits than its factorization.

1385133739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21090.

The product of its digits is 204120, while the sum is 43.

The square root of 1385133739 is about 37217.3849027575. The cubic root of 1385133739 is about 1114.7151474610.

The spelling of 1385133739 in words is "one billion, three hundred eighty-five million, one hundred thirty-three thousand, seven hundred thirty-nine".