137438951393 has 2 divisors, whose sum is σ = 137438951394. Its totient is φ = 137438951392.

The previous prime is 137438951357. The next prime is 137438951401. The reversal of 137438951393 is 393159834731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100038098944 + 37400852449 = 316288^2 + 193393^2 .

It is a cyclic number.

It is not a de Polignac number, because 137438951393 - 2⁸ = 137438951137 is a prime.

It is not a weakly prime, because it can be changed into another prime (137438950393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68719475696 + 68719475697.

It is an arithmetic number, because the mean of its divisors is an integer number (68719475697).

Almost surely, 2^137438951393 is an apocalyptic number.

It is an amenable number.

137438951393 is a deficient number, since it is larger than the sum of its proper divisors (1).

137438951393 is an equidigital number, since it uses as much as digits as its factorization.

137438951393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The spelling of 137438951393 in words is "one hundred thirty-seven billion, four hundred thirty-eight million, nine hundred fifty-one thousand, three hundred ninety-three".