139673529 has 6 divisors (see below), whose sum is σ = 201750666. Its totient is φ = 93115680.

The previous prime is 139673489. The next prime is 139673531. The reversal of 139673529 is 925376931.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 1375929 = 11760^2 + 1173^2 .

It is not a de Polignac number, because 139673529 - 2¹¹ = 139671481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139673329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7759632 + ... + 7759649.

It is an arithmetic number, because the mean of its divisors is an integer number (33625111).

Almost surely, 2^139673529 is an apocalyptic number.

It is an amenable number.

139673529 is a deficient number, since it is larger than the sum of its proper divisors (62077137).

139673529 is a wasteful number, since it uses less digits than its factorization.

139673529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15519287 (or 15519284 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 139673529 is about 11818.3555962748. The cubic root of 139673529 is about 518.8454772923.

The spelling of 139673529 in words is "one hundred thirty-nine million, six hundred seventy-three thousand, five hundred twenty-nine".