139607669 has 2 divisors, whose sum is σ = 139607670. Its totient is φ = 139607668.

The previous prime is 139607647. The next prime is 139607717. The reversal of 139607669 is 966706931.

It is a happy number.

139607669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113699569 + 25908100 = 10663^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 139607669 - 2¹² = 139603573 is a prime.

It is a super-2 number, since 2×139607669² = 38980602487227122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139607969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69803834 + 69803835.

It is an arithmetic number, because the mean of its divisors is an integer number (69803835).

Almost surely, 2^139607669 is an apocalyptic number.

It is an amenable number.

139607669 is a deficient number, since it is larger than the sum of its proper divisors (1).

139607669 is an equidigital number, since it uses as much as digits as its factorization.

139607669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 139607669 is about 11815.5689240933. The cubic root of 139607669 is about 518.7639143894.

The spelling of 139607669 in words is "one hundred thirty-nine million, six hundred seven thousand, six hundred sixty-nine".