13550381939 has 2 divisors, whose sum is σ = 13550381940. Its totient is φ = 13550381938.

The previous prime is 13550381917. The next prime is 13550381959. The reversal of 13550381939 is 93918305531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13550381939 - 2⁸ = 13550381683 is a prime.

It is a super-2 number, since 2×13550381939² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13550381893 and 13550381902.

It is not a weakly prime, because it can be changed into another prime (13550381959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775190969 + 6775190970.

It is an arithmetic number, because the mean of its divisors is an integer number (6775190970).

Almost surely, 2^13550381939 is an apocalyptic number.

13550381939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13550381939 is an equidigital number, since it uses as much as digits as its factorization.

13550381939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 13550381939 in words is "thirteen billion, five hundred fifty million, three hundred eighty-one thousand, nine hundred thirty-nine".