139925769 has 4 divisors (see below), whose sum is σ = 186567696. Its totient is φ = 93283844.

The previous prime is 139925761. The next prime is 139925789. The reversal of 139925769 is 967529931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139925769 - 2³ = 139925761 is a prime.

It is a super-2 number, since 2×139925769² = 39158441660482722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139925761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23320959 + ... + 23320964.

It is an arithmetic number, because the mean of its divisors is an integer number (46641924).

Almost surely, 2^139925769 is an apocalyptic number.

It is an amenable number.

139925769 is a deficient number, since it is larger than the sum of its proper divisors (46641927).

139925769 is an equidigital number, since it uses as much as digits as its factorization.

139925769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46641926.

The product of its digits is 918540, while the sum is 51.

The square root of 139925769 is about 11829.0223180109. The cubic root of 139925769 is about 519.1576215724.

The spelling of 139925769 in words is "one hundred thirty-nine million, nine hundred twenty-five thousand, seven hundred sixty-nine".