61996709 has 6 divisors (see below), whose sum is σ = 62297010. Its totient is φ = 61697616.

The previous prime is 61996687. The next prime is 61996723. The reversal of 61996709 is 90769916.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 32239684 + 29757025 = 5678^2 + 5455^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61996709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61996769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121547 + ... + 122055.

It is an arithmetic number, because the mean of its divisors is an integer number (10382835).

Almost surely, 2^61996709 is an apocalyptic number.

It is an amenable number.

61996709 is a deficient number, since it is larger than the sum of its proper divisors (300301).

61996709 is an frugal number, since it uses more digits than its factorization.

61996709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 61996709 is about 7873.7988925296. The cubic root of 61996709 is about 395.7821579295.

The spelling of 61996709 in words is "sixty-one million, nine hundred ninety-six thousand, seven hundred nine".