139139953 has 2 divisors, whose sum is σ = 139139954. Its totient is φ = 139139952.

The previous prime is 139139939. The next prime is 139139969. The reversal of 139139953 is 359931931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134374464 + 4765489 = 11592^2 + 2183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139139953 is a prime.

It is not a weakly prime, because it can be changed into another prime (139139933) 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, 69569976 + 69569977.

It is an arithmetic number, because the mean of its divisors is an integer number (69569977).

Almost surely, 2^139139953 is an apocalyptic number.

It is an amenable number.

139139953 is a deficient number, since it is larger than the sum of its proper divisors (1).

139139953 is an equidigital number, since it uses as much as digits as its factorization.

139139953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98415, while the sum is 43.

The square root of 139139953 is about 11795.7599585614. The cubic root of 139139953 is about 518.1839423167.

The spelling of 139139953 in words is "one hundred thirty-nine million, one hundred thirty-nine thousand, nine hundred fifty-three".