161633337 has 4 divisors (see below), whose sum is σ = 215511120. Its totient is φ = 107755556.

The previous prime is 161633333. The next prime is 161633363. The reversal of 161633337 is 733336161.

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 not a de Polignac number, because 161633337 - 2² = 161633333 is a prime.

It is a super-2 number, since 2×161633337² = 52250671259511138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161633298 and 161633307.

It is not an unprimeable number, because it can be changed into a prime (161633333) 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, 26938887 + ... + 26938892.

It is an arithmetic number, because the mean of its divisors is an integer number (53877780).

Almost surely, 2^161633337 is an apocalyptic number.

It is an amenable number.

161633337 is a deficient number, since it is larger than the sum of its proper divisors (53877783).

161633337 is an equidigital number, since it uses as much as digits as its factorization.

161633337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53877782.

The product of its digits is 20412, while the sum is 33.

The square root of 161633337 is about 12713.5100188736. The cubic root of 161633337 is about 544.7245888438.

Adding to 161633337 its reverse (733336161), we get a palindrome (894969498).

The spelling of 161633337 in words is "one hundred sixty-one million, six hundred thirty-three thousand, three hundred thirty-seven".