61799897 has 4 divisors (see below), whose sum is σ = 62400000. Its totient is φ = 61199796.

The previous prime is 61799869. The next prime is 61799917. The reversal of 61799897 is 79899716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61799897 - 2¹⁸ = 61537753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61796897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299897 + ... + 300102.

It is an arithmetic number, because the mean of its divisors is an integer number (15600000).

Almost surely, 2^61799897 is an apocalyptic number.

It is an amenable number.

61799897 is a deficient number, since it is larger than the sum of its proper divisors (600103).

61799897 is a wasteful number, since it uses less digits than its factorization.

61799897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600102.

The product of its digits is 1714608, while the sum is 56.

The square root of 61799897 is about 7861.2910517294. The cubic root of 61799897 is about 395.3629031443.

The spelling of 61799897 in words is "sixty-one million, seven hundred ninety-nine thousand, eight hundred ninety-seven".