139402357 has 2 divisors, whose sum is σ = 139402358. Its totient is φ = 139402356.

The previous prime is 139402343. The next prime is 139402451. The reversal of 139402357 is 753204931.

139402357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103510276 + 35892081 = 10174^2 + 5991^2 .

It is an emirp because it is prime and its reverse (753204931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139402357 - 2⁷ = 139402229 is a prime.

It is equal to p_7880236 and since 139402357 and 7880236 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139402657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69701178 + 69701179.

It is an arithmetic number, because the mean of its divisors is an integer number (69701179).

Almost surely, 2^139402357 is an apocalyptic number.

It is an amenable number.

139402357 is a deficient number, since it is larger than the sum of its proper divisors (1).

139402357 is an equidigital number, since it uses as much as digits as its factorization.

139402357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 139402357 is about 11806.8775296435. The cubic root of 139402357 is about 518.5094854077.

The spelling of 139402357 in words is "one hundred thirty-nine million, four hundred two thousand, three hundred fifty-seven".