139933697 has 4 divisors (see below), whose sum is σ = 143346756. Its totient is φ = 136520640.

The previous prime is 139933691. The next prime is 139933699. The reversal of 139933697 is 796339931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30019441 + 109914256 = 5479^2 + 10484^2 .

It is a cyclic number.

It is not a de Polignac number, because 139933697 - 2¹⁰ = 139932673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139933691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706468 + ... + 1706549.

It is an arithmetic number, because the mean of its divisors is an integer number (35836689).

Almost surely, 2^139933697 is an apocalyptic number.

It is an amenable number.

139933697 is a deficient number, since it is larger than the sum of its proper divisors (3413059).

139933697 is an equidigital number, since it uses as much as digits as its factorization.

139933697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413058.

The product of its digits is 826686, while the sum is 50.

The square root of 139933697 is about 11829.3574212634. The cubic root of 139933697 is about 519.1674263042.

The spelling of 139933697 in words is "one hundred thirty-nine million, nine hundred thirty-three thousand, six hundred ninety-seven".