61047547 has 4 divisors (see below), whose sum is σ = 66597336. Its totient is φ = 55497760.

The previous prime is 61047541. The next prime is 61047557. The reversal of 61047547 is 74574016.

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 61047547 - 2⁷ = 61047419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61047541) 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, 2774878 + ... + 2774899.

It is an arithmetic number, because the mean of its divisors is an integer number (16649334).

Almost surely, 2^61047547 is an apocalyptic number.

61047547 is a deficient number, since it is larger than the sum of its proper divisors (5549789).

61047547 is a wasteful number, since it uses less digits than its factorization.

61047547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549788.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 61047547 is about 7813.2929677569. The cubic root of 61047547 is about 393.7519696886.

The spelling of 61047547 in words is "sixty-one million, forty-seven thousand, five hundred forty-seven".