139983397 has 4 divisors (see below), whose sum is σ = 140399116. Its totient is φ = 139567680.

The previous prime is 139983373. The next prime is 139983407. The reversal of 139983397 is 793389931.

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 12609601 + 127373796 = 3551^2 + 11286^2 .

It is a cyclic number.

It is not a de Polignac number, because 139983397 - 2⁷ = 139983269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139983367) 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, 207354 + ... + 208027.

It is an arithmetic number, because the mean of its divisors is an integer number (35099779).

Almost surely, 2^139983397 is an apocalyptic number.

It is an amenable number.

139983397 is a deficient number, since it is larger than the sum of its proper divisors (415719).

139983397 is an equidigital number, since it uses as much as digits as its factorization.

139983397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415718.

The product of its digits is 1102248, while the sum is 52.

The square root of 139983397 is about 11831.4579405921. The cubic root of 139983397 is about 519.2288829499.

The spelling of 139983397 in words is "one hundred thirty-nine million, nine hundred eighty-three thousand, three hundred ninety-seven".