139698769 has 8 divisors (see below), whose sum is σ = 159727680. Its totient is φ = 119687856.

The previous prime is 139698749. The next prime is 139698821. The reversal of 139698769 is 967896931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139698769 - 2⁷ = 139698641 is a prime.

It is a super-2 number, since 2×139698769² = 39031492120230722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139698709) 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 7 ways as a sum of consecutive naturals, for example, 25422 + ... + 30424.

It is an arithmetic number, because the mean of its divisors is an integer number (19965960).

Almost surely, 2^139698769 is an apocalyptic number.

It is an amenable number.

139698769 is a deficient number, since it is larger than the sum of its proper divisors (20028911).

139698769 is an equidigital number, since it uses as much as digits as its factorization.

139698769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999.

The product of its digits is 4408992, while the sum is 58.

The square root of 139698769 is about 11819.4233784902. The cubic root of 139698769 is about 518.8767284325.

The spelling of 139698769 in words is "one hundred thirty-nine million, six hundred ninety-eight thousand, seven hundred sixty-nine".