61199995 has 4 divisors (see below), whose sum is σ = 73440000. Its totient is φ = 48959992.

The previous prime is 61199993. The next prime is 61200023. The reversal of 61199995 is 59999116.

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 61199995 - 2¹ = 61199993 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61199993) 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, 6119995 + ... + 6120004.

It is an arithmetic number, because the mean of its divisors is an integer number (18360000).

Almost surely, 2^61199995 is an apocalyptic number.

61199995 is a deficient number, since it is larger than the sum of its proper divisors (12240005).

61199995 is a wasteful number, since it uses less digits than its factorization.

61199995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240004.

The product of its digits is 196830, while the sum is 49.

The square root of 61199995 is about 7823.0425666744. The cubic root of 61199995 is about 394.0794565202.

The spelling of 61199995 in words is "sixty-one million, one hundred ninety-nine thousand, nine hundred ninety-five".