139551673 has 2 divisors, whose sum is σ = 139551674. Its totient is φ = 139551672.

The previous prime is 139551631. The next prime is 139551689. The reversal of 139551673 is 376155931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96884649 + 42667024 = 9843^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 139551673 - 2¹⁷ = 139420601 is a prime.

It is not a weakly prime, because it can be changed into another prime (139551613) 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, 69775836 + 69775837.

It is an arithmetic number, because the mean of its divisors is an integer number (69775837).

Almost surely, 2^139551673 is an apocalyptic number.

It is an amenable number.

139551673 is a deficient number, since it is larger than the sum of its proper divisors (1).

139551673 is an equidigital number, since it uses as much as digits as its factorization.

139551673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 40.

The square root of 139551673 is about 11813.1991010056. The cubic root of 139551673 is about 518.6945471668.

The spelling of 139551673 in words is "one hundred thirty-nine million, five hundred fifty-one thousand, six hundred seventy-three".