61819330 has 8 divisors (see below), whose sum is σ = 111274812. Its totient is φ = 24727728.

The previous prime is 61819319. The next prime is 61819339. The reversal of 61819330 is 3391816.

It can be written as a sum of positive squares in 2 ways, for example, as 57653649 + 4165681 = 7593^2 + 2041^2 .

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 = 61819292 and 61819301.

It is not an unprimeable number, because it can be changed into a prime (61819339) 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, 3090957 + ... + 3090976.

Almost surely, 2^61819330 is an apocalyptic number.

61819330 is a deficient number, since it is larger than the sum of its proper divisors (49455482).

61819330 is a wasteful number, since it uses less digits than its factorization.

61819330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181940.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 61819330 is about 7862.5269474896. The cubic root of 61819330 is about 395.4043394707.

The spelling of 61819330 in words is "sixty-one million, eight hundred nineteen thousand, three hundred thirty".