139926965 has 4 divisors (see below), whose sum is σ = 167912364. Its totient is φ = 111941568.

The previous prime is 139926959. The next prime is 139926967. The reversal of 139926965 is 569629931.

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 45778756 + 94148209 = 6766^2 + 9703^2 .

It is a cyclic number.

It is not a de Polignac number, because 139926965 - 2¹⁰ = 139925941 is a prime.

It is a super-2 number, since 2×139926965² = 39159111068222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139926967) 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, 13992692 + ... + 13992701.

It is an arithmetic number, because the mean of its divisors is an integer number (41978091).

Almost surely, 2^139926965 is an apocalyptic number.

It is an amenable number.

139926965 is a deficient number, since it is larger than the sum of its proper divisors (27985399).

139926965 is an equidigital number, since it uses as much as digits as its factorization.

139926965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27985398.

The product of its digits is 787320, while the sum is 50.

The square root of 139926965 is about 11829.0728715314. The cubic root of 139926965 is about 519.1591007156.

The spelling of 139926965 in words is "one hundred thirty-nine million, nine hundred twenty-six thousand, nine hundred sixty-five".