163072901 has 4 divisors (see below), whose sum is σ = 164167500. Its totient is φ = 161978304.

The previous prime is 163072859. The next prime is 163072907. The reversal of 163072901 is 109270361.

It is a Cunningham number, because it is equal to 12770²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19096900 + 143976001 = 4370^2 + 11999^2 .

It is a cyclic number.

It is not a de Polignac number, because 163072901 - 2⁶ = 163072837 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163072907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547076 + ... + 547373.

It is an arithmetic number, because the mean of its divisors is an integer number (41041875).

Almost surely, 2^163072901 is an apocalyptic number.

It is an amenable number.

163072901 is a deficient number, since it is larger than the sum of its proper divisors (1094599).

163072901 is a wasteful number, since it uses less digits than its factorization.

163072901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094598.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 163072901 is about 12770.0000391543. Note that the first 4 decimals coincide. The cubic root of 163072901 is about 546.3369817519.

The spelling of 163072901 in words is "one hundred sixty-three million, seventy-two thousand, nine hundred one".