139148369 has 2 divisors, whose sum is σ = 139148370. Its totient is φ = 139148368.

The previous prime is 139148357. The next prime is 139148371. The reversal of 139148369 is 963841931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138886225 + 262144 = 11785^2 + 512^2 .

It is a cyclic number.

It is not a de Polignac number, because 139148369 - 2⁴ = 139148353 is a prime.

It is a super-2 number, since 2×139148369² = 38724537190720322, which contains 22 as substring.

Together with 139148371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139148969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69574184 + 69574185.

It is an arithmetic number, because the mean of its divisors is an integer number (69574185).

Almost surely, 2^139148369 is an apocalyptic number.

It is an amenable number.

139148369 is a deficient number, since it is larger than the sum of its proper divisors (1).

139148369 is an equidigital number, since it uses as much as digits as its factorization.

139148369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 139148369 is about 11796.1166915218. The cubic root of 139148369 is about 518.1943897068.

The spelling of 139148369 in words is "one hundred thirty-nine million, one hundred forty-eight thousand, three hundred sixty-nine".