139293168401 has 4 divisors (see below), whose sum is σ = 139293987252. Its totient is φ = 139292349552.

The previous prime is 139293168389. The next prime is 139293168431. The reversal of 139293168401 is 104861392931.

It is a Cunningham number, because it is equal to 373220²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104861392931 = 23 ⋅4559190997.

It can be written as a sum of positive squares in 2 ways, for example, as 76299698176 + 62993470225 = 276224^2 + 250985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139293168401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139293168431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47786 + ... + 529971.

It is an arithmetic number, because the mean of its divisors is an integer number (34823496813).

Almost surely, 2^139293168401 is an apocalyptic number.

It is an amenable number.

139293168401 is a deficient number, since it is larger than the sum of its proper divisors (818851).

139293168401 is an equidigital number, since it uses as much as digits as its factorization.

139293168401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818850.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 139293168401 in words is "one hundred thirty-nine billion, two hundred ninety-three million, one hundred sixty-eight thousand, four hundred one".