61898 has 4 divisors (see below), whose sum is σ = 92850. Its totient is φ = 30948.

The previous prime is 61879. The next prime is 61909. The reversal of 61898 is 89816.

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

It can be written as a sum of positive squares in only one way, i.e., 37249 + 24649 = 193^2 + 157^2 .

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15473 + ... + 15476.

2⁶¹⁸⁹⁸ is an apocalyptic number.

61898 is a deficient number, since it is larger than the sum of its proper divisors (30952).

61898 is a wasteful number, since it uses less digits than its factorization.

61898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30951.

The product of its digits is 3456, while the sum is 32.

The square root of 61898 is about 248.7930867207. The cubic root of 61898 is about 39.5571996165.

It can be divided in two parts, 61 and 898, that added together give a palindrome (959).

The spelling of 61898 in words is "sixty-one thousand, eight hundred ninety-eight".