61936899 has 32 divisors (see below), whose sum is σ = 91137024. Its totient is φ = 37255680.

The previous prime is 61936883. The next prime is 61936939. The reversal of 61936899 is 99863916.

It is a Cunningham number, because it is equal to 7870²-1.

It is not a de Polignac number, because 61936899 - 2⁴ = 61936883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (61936099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133542 + ... + 134004.

It is an arithmetic number, because the mean of its divisors is an integer number (2848032).

Almost surely, 2^61936899 is an apocalyptic number.

61936899 is a deficient number, since it is larger than the sum of its proper divisors (29200125).

61936899 is a wasteful number, since it uses less digits than its factorization.

61936899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its digits is 629856, while the sum is 51.

The square root of 61936899 is about 7869.9999364676. Note that the first 4 decimals coincide. The cubic root of 61936899 is about 395.6548428531.

It can be divided in two parts, 61936 and 899, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 61936899 in words is "sixty-one million, nine hundred thirty-six thousand, eight hundred ninety-nine".