61617047 has 4 divisors (see below), whose sum is σ = 62928096. Its totient is φ = 60306000.

The previous prime is 61617043. The next prime is 61617079. The reversal of 61617047 is 74071616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61617047 - 2² = 61617043 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 (61617041) 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, 655454 + ... + 655547.

It is an arithmetic number, because the mean of its divisors is an integer number (15732024).

Almost surely, 2^61617047 is an apocalyptic number.

61617047 is a deficient number, since it is larger than the sum of its proper divisors (1311049).

61617047 is a wasteful number, since it uses less digits than its factorization.

61617047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311048.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 61617047 is about 7849.6526674752. The cubic root of 61617047 is about 394.9725922339.

The spelling of 61617047 in words is "sixty-one million, six hundred seventeen thousand, forty-seven".