61943743 has 16 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 56721600.

The previous prime is 61943729. The next prime is 61943753. The reversal of 61943743 is 34734916.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61943743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61943753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101746 + ... + 102352.

It is an arithmetic number, because the mean of its divisors is an integer number (4213440).

Almost surely, 2^61943743 is an apocalyptic number.

61943743 is the 4978-th heptagonal number.

61943743 is a deficient number, since it is larger than the sum of its proper divisors (5471297).

61943743 is a wasteful number, since it uses less digits than its factorization.

61943743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its digits is 54432, while the sum is 37.

The square root of 61943743 is about 7870.4347402161. The cubic root of 61943743 is about 395.6694155449.

The spelling of 61943743 in words is "sixty-one million, nine hundred forty-three thousand, seven hundred forty-three".