61998869 has 8 divisors (see below), whose sum is σ = 64774080. Its totient is φ = 59230336.

The previous prime is 61998863. The next prime is 61998877. The reversal of 61998869 is 96889916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61998869 is a prime.

It is a super-2 number, since 2×61998869² = 7687719514558322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61998863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31877 + ... + 33765.

It is an arithmetic number, because the mean of its divisors is an integer number (8096760).

Almost surely, 2^61998869 is an apocalyptic number.

It is an amenable number.

61998869 is a deficient number, since it is larger than the sum of its proper divisors (2775211).

61998869 is a wasteful number, since it uses less digits than its factorization.

61998869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339.

The product of its digits is 1679616, while the sum is 56.

The square root of 61998869 is about 7873.9360551125. The cubic root of 61998869 is about 395.7867543000.

The spelling of 61998869 in words is "sixty-one million, nine hundred ninety-eight thousand, eight hundred sixty-nine".