61634137 has 4 divisors (see below), whose sum is σ = 61663140. Its totient is φ = 61605136.

The previous prime is 61634051. The next prime is 61634143. The reversal of 61634137 is 73143616.

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 19501056 + 42133081 = 4416^2 + 6491^2 .

It is a cyclic number.

It is not a de Polignac number, because 61634137 - 2⁷ = 61634009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61634099 and 61634108.

It is not an unprimeable number, because it can be changed into a prime (61635137) 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, 11038 + ... + 15655.

It is an arithmetic number, because the mean of its divisors is an integer number (15415785).

Almost surely, 2^61634137 is an apocalyptic number.

It is an amenable number.

61634137 is a deficient number, since it is larger than the sum of its proper divisors (29003).

61634137 is a wasteful number, since it uses less digits than its factorization.

61634137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29002.

The product of its digits is 9072, while the sum is 31.

The square root of 61634137 is about 7850.7411752012. The cubic root of 61634137 is about 395.0091051685.

The spelling of 61634137 in words is "sixty-one million, six hundred thirty-four thousand, one hundred thirty-seven".