5161994 has 4 divisors (see below), whose sum is σ = 7742994. Its totient is φ = 2580996.

The previous prime is 5161993. The next prime is 5161997. The reversal of 5161994 is 4991615.

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

It can be written as a sum of positive squares in only one way, i.e., 4464769 + 697225 = 2113^2 + 835^2 .

It is not an unprimeable number, because it can be changed into a prime (5161993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290497 + ... + 1290500.

Almost surely, 2^5161994 is an apocalyptic number.

5161994 is a deficient number, since it is larger than the sum of its proper divisors (2581000).

5161994 is a wasteful number, since it uses less digits than its factorization.

5161994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580999.

The product of its digits is 9720, while the sum is 35.

The square root of 5161994 is about 2272.0022007032. The cubic root of 5161994 is about 172.8247080081.

The spelling of 5161994 in words is "five million, one hundred sixty-one thousand, nine hundred ninety-four".