163769971 has 6 divisors (see below), whose sum is σ = 164733116. Its totient is φ = 162808800.

The previous prime is 163769953. The next prime is 163769981. The reversal of 163769971 is 179967361.

It is not a de Polignac number, because 163769971 - 2²³ = 155381363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163769941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 185451 + ... + 186331.

Almost surely, 2^163769971 is an apocalyptic number.

163769971 is a deficient number, since it is larger than the sum of its proper divisors (963145).

163769971 is an frugal number, since it uses more digits than its factorization.

163769971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1092 counting only the distinct ones).

The product of its digits is 428652, while the sum is 49.

The square root of 163769971 is about 12797.2641998202. The cubic root of 163769971 is about 547.1143309505.

The spelling of 163769971 in words is "one hundred sixty-three million, seven hundred sixty-nine thousand, nine hundred seventy-one".