61996747 has 4 divisors (see below), whose sum is σ = 62449416. Its totient is φ = 61544080.

The previous prime is 61996741. The next prime is 61996757. The reversal of 61996747 is 74769916.

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-61996747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61996747.

It is not an unprimeable number, because it can be changed into a prime (61996741) 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, 226129 + ... + 226402.

It is an arithmetic number, because the mean of its divisors is an integer number (15612354).

Almost surely, 2^61996747 is an apocalyptic number.

61996747 is a deficient number, since it is larger than the sum of its proper divisors (452669).

61996747 is a wasteful number, since it uses less digits than its factorization.

61996747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452668.

The product of its digits is 571536, while the sum is 49.

The square root of 61996747 is about 7873.8013055957. The cubic root of 61996747 is about 395.7822387925.

The spelling of 61996747 in words is "sixty-one million, nine hundred ninety-six thousand, seven hundred forty-seven".