61982491 has 4 divisors (see below), whose sum is σ = 62729352. Its totient is φ = 61235632.

The previous prime is 61982461. The next prime is 61982497. The reversal of 61982491 is 19428916.

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 61982491 - 2¹⁹ = 61458203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61982497) 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, 373306 + ... + 373471.

It is an arithmetic number, because the mean of its divisors is an integer number (15682338).

Almost surely, 2^61982491 is an apocalyptic number.

61982491 is a deficient number, since it is larger than the sum of its proper divisors (746861).

61982491 is an equidigital number, since it uses as much as digits as its factorization.

61982491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746860.

The product of its digits is 31104, while the sum is 40.

The square root of 61982491 is about 7872.8959728933. The cubic root of 61982491 is about 395.7519000817.

The spelling of 61982491 in words is "sixty-one million, nine hundred eighty-two thousand, four hundred ninety-one".