139699253 has 2 divisors, whose sum is σ = 139699254. Its totient is φ = 139699252.

The previous prime is 139699249. The next prime is 139699279. The reversal of 139699253 is 352996931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130347889 + 9351364 = 11417^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 139699253 - 2² = 139699249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139699198 and 139699207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139699213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69849626 + 69849627.

It is an arithmetic number, because the mean of its divisors is an integer number (69849627).

Almost surely, 2^139699253 is an apocalyptic number.

It is an amenable number.

139699253 is a deficient number, since it is larger than the sum of its proper divisors (1).

139699253 is an equidigital number, since it uses as much as digits as its factorization.

139699253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 47.

The square root of 139699253 is about 11819.4438532445. The cubic root of 139699253 is about 518.8773276648.

The spelling of 139699253 in words is "one hundred thirty-nine million, six hundred ninety-nine thousand, two hundred fifty-three".