61898461 has 4 divisors (see below), whose sum is σ = 61932924. Its totient is φ = 61864000.

The previous prime is 61898453. The next prime is 61898467. The reversal of 61898461 is 16489816.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24810361 + 37088100 = 4981^2 + 6090^2 .

It is a cyclic number.

It is not a de Polignac number, because 61898461 - 2³ = 61898453 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61898467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14380 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (15483231).

Almost surely, 2^61898461 is an apocalyptic number.

It is an amenable number.

61898461 is a deficient number, since it is larger than the sum of its proper divisors (34463).

61898461 is a wasteful number, since it uses less digits than its factorization.

61898461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34462.

The product of its digits is 82944, while the sum is 43.

The square root of 61898461 is about 7867.5574989955. The cubic root of 61898461 is about 395.5729782014.

The spelling of 61898461 in words is "sixty-one million, eight hundred ninety-eight thousand, four hundred sixty-one".