1383839957 has 2 divisors, whose sum is σ = 1383839958. Its totient is φ = 1383839956.

The previous prime is 1383839929. The next prime is 1383839981. The reversal of 1383839957 is 7599383831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970571716 + 413268241 = 31154^2 + 20329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383839957 - 2¹⁰ = 1383838933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1383839057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691919978 + 691919979.

It is an arithmetic number, because the mean of its divisors is an integer number (691919979).

Almost surely, 2^1383839957 is an apocalyptic number.

It is an amenable number.

1383839957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1383839957 is an equidigital number, since it uses as much as digits as its factorization.

1383839957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 1383839957 is about 37199.9994220430. Note that the first 3 decimals coincide. The cubic root of 1383839957 is about 1114.3679733667.

The spelling of 1383839957 in words is "one billion, three hundred eighty-three million, eight hundred thirty-nine thousand, nine hundred fifty-seven".