163437401 has 4 divisors (see below), whose sum is σ = 163522212. Its totient is φ = 163352592.

The previous prime is 163437353. The next prime is 163437403. The reversal of 163437401 is 104734361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104734361 = 7517 ⋅13933.

It can be written as a sum of positive squares in 2 ways, for example, as 10272025 + 153165376 = 3205^2 + 12376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163437401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163437403) 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, 39446 + ... + 43391.

It is an arithmetic number, because the mean of its divisors is an integer number (40880553).

Almost surely, 2^163437401 is an apocalyptic number.

It is an amenable number.

163437401 is a deficient number, since it is larger than the sum of its proper divisors (84811).

163437401 is an equidigital number, since it uses as much as digits as its factorization.

163437401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84810.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 163437401 is about 12784.2638035985. The cubic root of 163437401 is about 546.7437357055.

The spelling of 163437401 in words is "one hundred sixty-three million, four hundred thirty-seven thousand, four hundred one".