61861943 has 24 divisors (see below), whose sum is σ = 73996416. Its totient is φ = 51261600.

The previous prime is 61861897. The next prime is 61861951. The reversal of 61861943 is 34916816.

It is not a de Polignac number, because 61861943 - 2⁸ = 61861687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61861897 and 61861906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61861043) 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 23 ways as a sum of consecutive naturals, for example, 198758 + ... + 199068.

It is an arithmetic number, because the mean of its divisors is an integer number (3083184).

Almost surely, 2^61861943 is an apocalyptic number.

61861943 is a deficient number, since it is larger than the sum of its proper divisors (12134473).

61861943 is a wasteful number, since it uses less digits than its factorization.

61861943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 442 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 61861943 is about 7865.2363600848. The cubic root of 61861943 is about 395.4951713356.

The spelling of 61861943 in words is "sixty-one million, eight hundred sixty-one thousand, nine hundred forty-three".