163780069 has 4 divisors (see below), whose sum is σ = 163864000. Its totient is φ = 163696140.

The previous prime is 163780051. The next prime is 163780103. The reversal of 163780069 is 960087361.

163780069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-163780069 is a prime.

It is a super-2 number, since 2×163780069² = 53647822003289522, 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 (163780009) 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, 38967 + ... + 42964.

It is an arithmetic number, because the mean of its divisors is an integer number (40966000).

Almost surely, 2^163780069 is an apocalyptic number.

It is an amenable number.

163780069 is a deficient number, since it is larger than the sum of its proper divisors (83931).

163780069 is an equidigital number, since it uses as much as digits as its factorization.

163780069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83930.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 163780069 is about 12797.6587311899. The cubic root of 163780069 is about 547.1255756797.

The spelling of 163780069 in words is "one hundred sixty-three million, seven hundred eighty thousand, sixty-nine".