61499943 has 12 divisors (see below), whose sum is σ = 89349000. Its totient is φ = 40761936.

The previous prime is 61499891. The next prime is 61499983. The reversal of 61499943 is 34999416.

It is not a de Polignac number, because 61499943 - 2⁸ = 61499687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61499983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18193 + ... + 21306.

It is an arithmetic number, because the mean of its divisors is an integer number (7445750).

Almost surely, 2^61499943 is an apocalyptic number.

61499943 is a deficient number, since it is larger than the sum of its proper divisors (27849057).

61499943 is a wasteful number, since it uses less digits than its factorization.

61499943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39678 (or 39675 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 61499943 is about 7842.1899364910. The cubic root of 61499943 is about 394.7222167016.

The spelling of 61499943 in words is "sixty-one million, four hundred ninety-nine thousand, nine hundred forty-three".