61606437 has 4 divisors (see below), whose sum is σ = 82141920. Its totient is φ = 41070956.

The previous prime is 61606421. The next prime is 61606439. The reversal of 61606437 is 73460616.

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 61606437 - 2⁴ = 61606421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61606398 and 61606407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61606439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10267737 + ... + 10267742.

It is an arithmetic number, because the mean of its divisors is an integer number (20535480).

Almost surely, 2^61606437 is an apocalyptic number.

It is an amenable number.

61606437 is a deficient number, since it is larger than the sum of its proper divisors (20535483).

61606437 is a wasteful number, since it uses less digits than its factorization.

61606437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20535482.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 61606437 is about 7848.9768122985. The cubic root of 61606437 is about 394.9499204790.

The spelling of 61606437 in words is "sixty-one million, six hundred six thousand, four hundred thirty-seven".