38279693449 has 2 divisors, whose sum is σ = 38279693450. Its totient is φ = 38279693448.

The previous prime is 38279693429. The next prime is 38279693467. The reversal of 38279693449 is 94439697283.

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., 33204128400 + 5075565049 = 182220^2 + 71243^2 .

It is a cyclic number.

It is not a de Polignac number, because 38279693449 - 2⁹ = 38279692937 is a prime.

It is not a weakly prime, because it can be changed into another prime (38279693429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19139846724 + 19139846725.

It is an arithmetic number, because the mean of its divisors is an integer number (19139846725).

Almost surely, 2^38279693449 is an apocalyptic number.

It is an amenable number.

38279693449 is a deficient number, since it is larger than the sum of its proper divisors (1).

38279693449 is an equidigital number, since it uses as much as digits as its factorization.

38279693449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 64.

The spelling of 38279693449 in words is "thirty-eight billion, two hundred seventy-nine million, six hundred ninety-three thousand, four hundred forty-nine".