61713783 has 12 divisors (see below), whose sum is σ = 90824760. Its totient is φ = 40365936.

The previous prime is 61713781. The next prime is 61713787. The reversal of 61713783 is 38731716.

61713783 is a `hidden beast` number, since 617 + 1 + 37 + 8 + 3 = 666.

It is not a de Polignac number, because 61713783 - 2¹ = 61713781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61713781) 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, 64213 + ... + 65166.

It is an arithmetic number, because the mean of its divisors is an integer number (7568730).

Almost surely, 2^61713783 is an apocalyptic number.

61713783 is a deficient number, since it is larger than the sum of its proper divisors (29110977).

61713783 is a wasteful number, since it uses less digits than its factorization.

61713783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129438 (or 129435 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61713783 is about 7855.8120522324. The cubic root of 61713783 is about 395.1791805779.

It can be divided in two parts, 617 and 13783, that added together give a square (14400 = 120²).

The spelling of 61713783 in words is "sixty-one million, seven hundred thirteen thousand, seven hundred eighty-three".