139363347421 has 2 divisors, whose sum is σ = 139363347422. Its totient is φ = 139363347420.

The previous prime is 139363347359. The next prime is 139363347449. The reversal of 139363347421 is 124743363931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180639321 + 55182708100 = 290139^2 + 234910^2 .

It is a cyclic number.

It is not a de Polignac number, because 139363347421 - 2¹⁵ = 139363314653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139363347821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69681673710 + 69681673711.

It is an arithmetic number, because the mean of its divisors is an integer number (69681673711).

Almost surely, 2^139363347421 is an apocalyptic number.

It is an amenable number.

139363347421 is a deficient number, since it is larger than the sum of its proper divisors (1).

139363347421 is an equidigital number, since it uses as much as digits as its factorization.

139363347421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 46.

The spelling of 139363347421 in words is "one hundred thirty-nine billion, three hundred sixty-three million, three hundred forty-seven thousand, four hundred twenty-one".