61783130 has 8 divisors (see below), whose sum is σ = 111209652. Its totient is φ = 24713248.

The previous prime is 61783123. The next prime is 61783133. The reversal of 61783130 is 3138716.

It can be written as a sum of positive squares in 2 ways, for example, as 57592921 + 4190209 = 7589^2 + 2047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 61783093 and 61783102.

It is not an unprimeable number, because it can be changed into a prime (61783133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3089147 + ... + 3089166.

Almost surely, 2^61783130 is an apocalyptic number.

61783130 is a deficient number, since it is larger than the sum of its proper divisors (49426522).

61783130 is a wasteful number, since it uses less digits than its factorization.

61783130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178320.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61783130 is about 7860.2245514998. The cubic root of 61783130 is about 395.3271444579.

The spelling of 61783130 in words is "sixty-one million, seven hundred eighty-three thousand, one hundred thirty".