147785669 has 2 divisors, whose sum is σ = 147785670. Its totient is φ = 147785668.

The previous prime is 147785647. The next prime is 147785707. The reversal of 147785669 is 966587741.

147785669 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., 146724769 + 1060900 = 12113^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 147785669 - 2⁸ = 147785413 is a prime.

It is a super-2 number, since 2×147785669² = 43681207923555122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 147785669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147785639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73892834 + 73892835.

It is an arithmetic number, because the mean of its divisors is an integer number (73892835).

Almost surely, 2^147785669 is an apocalyptic number.

It is an amenable number.

147785669 is a deficient number, since it is larger than the sum of its proper divisors (1).

147785669 is an equidigital number, since it uses as much as digits as its factorization.

147785669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 147785669 is about 12156.7129192064. The cubic root of 147785669 is about 528.7017817118.

The spelling of 147785669 in words is "one hundred forty-seven million, seven hundred eighty-five thousand, six hundred sixty-nine".