139098251 has 2 divisors, whose sum is σ = 139098252. Its totient is φ = 139098250.

The previous prime is 139098217. The next prime is 139098263. The reversal of 139098251 is 152890931.

It is a strong prime.

It is an emirp because it is prime and its reverse (152890931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139098251 - 2¹⁰ = 139097227 is a prime.

It is not a weakly prime, because it can be changed into another prime (139098151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69549125 + 69549126.

It is an arithmetic number, because the mean of its divisors is an integer number (69549126).

Almost surely, 2^139098251 is an apocalyptic number.

139098251 is a deficient number, since it is larger than the sum of its proper divisors (1).

139098251 is an equidigital number, since it uses as much as digits as its factorization.

139098251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 139098251 is about 11793.9921570264. The cubic root of 139098251 is about 518.1321683881.

The spelling of 139098251 in words is "one hundred thirty-nine million, ninety-eight thousand, two hundred fifty-one".