139694953 has 2 divisors, whose sum is σ = 139694954. Its totient is φ = 139694952.

The previous prime is 139694923. The next prime is 139694963. The reversal of 139694953 is 359496931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91642329 + 48052624 = 9573^2 + 6932^2 .

It is a cyclic number.

It is not a de Polignac number, because 139694953 - 2⁵ = 139694921 is a prime.

It is equal to p_7895875 and since 139694953 and 7895875 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 139694897 and 139694906.

It is not a weakly prime, because it can be changed into another prime (139694923) 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, 69847476 + 69847477.

It is an arithmetic number, because the mean of its divisors is an integer number (69847477).

Almost surely, 2^139694953 is an apocalyptic number.

It is an amenable number.

139694953 is a deficient number, since it is larger than the sum of its proper divisors (1).

139694953 is an equidigital number, since it uses as much as digits as its factorization.

139694953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 49.

The square root of 139694953 is about 11819.2619481929. The cubic root of 139694953 is about 518.8720038582.

The spelling of 139694953 in words is "one hundred thirty-nine million, six hundred ninety-four thousand, nine hundred fifty-three".