61847947 has 6 divisors (see below), whose sum is σ = 71945628. Its totient is φ = 53012484.

The previous prime is 61847927. The next prime is 61847957. The reversal of 61847947 is 74974816.

It is a de Polignac number, because none of the positive numbers 2^k-61847947 is a prime.

It is a super-2 number, since 2×61847947² = 7650337096229618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61847897 and 61847906.

It is not an unprimeable number, because it can be changed into a prime (61847917) 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, 631053 + ... + 631150.

It is an arithmetic number, because the mean of its divisors is an integer number (11990938).

Almost surely, 2^61847947 is an apocalyptic number.

61847947 is a deficient number, since it is larger than the sum of its proper divisors (10097681).

61847947 is a wasteful number, since it uses less digits than its factorization.

61847947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262217 (or 1262210 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 61847947 is about 7864.3465717121. The cubic root of 61847947 is about 395.4653427224.

The spelling of 61847947 in words is "sixty-one million, eight hundred forty-seven thousand, nine hundred forty-seven".