61820983 has 4 divisors (see below), whose sum is σ = 70652560. Its totient is φ = 52989408.

The previous prime is 61820981. The next prime is 61821059. The reversal of 61820983 is 38902816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61820983 - 2¹ = 61820981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820981) 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, 4415778 + ... + 4415791.

It is an arithmetic number, because the mean of its divisors is an integer number (17663140).

Almost surely, 2^61820983 is an apocalyptic number.

61820983 is a deficient number, since it is larger than the sum of its proper divisors (8831577).

61820983 is an equidigital number, since it uses as much as digits as its factorization.

61820983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8831576.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 61820983 is about 7862.6320656635. The cubic root of 61820983 is about 395.4078637058.

The spelling of 61820983 in words is "sixty-one million, eight hundred twenty thousand, nine hundred eighty-three".