61534199 has 4 divisors (see below), whose sum is σ = 61562664. Its totient is φ = 61505736.

The previous prime is 61534189. The next prime is 61534273. The reversal of 61534199 is 99143516.

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 61534199 - 2⁸ = 61533943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61534189) 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, 10697 + ... + 15410.

It is an arithmetic number, because the mean of its divisors is an integer number (15390666).

Almost surely, 2^61534199 is an apocalyptic number.

61534199 is a deficient number, since it is larger than the sum of its proper divisors (28465).

61534199 is a wasteful number, since it uses less digits than its factorization.

61534199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28464.

The product of its digits is 29160, while the sum is 38.

The square root of 61534199 is about 7844.3737162376. The cubic root of 61534199 is about 394.7954909944.

The spelling of 61534199 in words is "sixty-one million, five hundred thirty-four thousand, one hundred ninety-nine".