139915441 has 2 divisors, whose sum is σ = 139915442. Its totient is φ = 139915440.

The previous prime is 139915429. The next prime is 139915469. The reversal of 139915441 is 144519931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138768400 + 1147041 = 11780^2 + 1071^2 .

It is an emirp because it is prime and its reverse (144519931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139915441 - 2⁷ = 139915313 is a prime.

It is a super-3 number, since 3×139915441³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_7907626 and since 139915441 and 7907626 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139915441.

It is not a weakly prime, because it can be changed into another prime (139915471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69957720 + 69957721.

It is an arithmetic number, because the mean of its divisors is an integer number (69957721).

Almost surely, 2^139915441 is an apocalyptic number.

It is an amenable number.

139915441 is a deficient number, since it is larger than the sum of its proper divisors (1).

139915441 is an equidigital number, since it uses as much as digits as its factorization.

139915441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 139915441 is about 11828.5857565476. The cubic root of 139915441 is about 519.1448481524.

The spelling of 139915441 in words is "one hundred thirty-nine million, nine hundred fifteen thousand, four hundred forty-one".