61607939 has 4 divisors (see below), whose sum is σ = 62153256. Its totient is φ = 61062624.

The previous prime is 61607927. The next prime is 61607947. The reversal of 61607939 is 93970616.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61607939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61607896 and 61607905.

It is not an unprimeable number, because it can be changed into a prime (61607239) 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, 272489 + ... + 272714.

It is an arithmetic number, because the mean of its divisors is an integer number (15538314).

Almost surely, 2^61607939 is an apocalyptic number.

61607939 is a deficient number, since it is larger than the sum of its proper divisors (545317).

61607939 is a wasteful number, since it uses less digits than its factorization.

61607939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545316.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 61607939 is about 7849.0724929765. The cubic root of 61607939 is about 394.9531301542.

The spelling of 61607939 in words is "sixty-one million, six hundred seven thousand, nine hundred thirty-nine".