139416493 has 2 divisors, whose sum is σ = 139416494. Its totient is φ = 139416492.

The previous prime is 139416479. The next prime is 139416499. The reversal of 139416493 is 394614931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116251524 + 23164969 = 10782^2 + 4813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139416493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139416499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69708246 + 69708247.

It is an arithmetic number, because the mean of its divisors is an integer number (69708247).

Almost surely, 2^139416493 is an apocalyptic number.

It is an amenable number.

139416493 is a deficient number, since it is larger than the sum of its proper divisors (1).

139416493 is an equidigital number, since it uses as much as digits as its factorization.

139416493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 139416493 is about 11807.4761486103. The cubic root of 139416493 is about 518.5270111811.

The spelling of 139416493 in words is "one hundred thirty-nine million, four hundred sixteen thousand, four hundred ninety-three".