61099967 has 4 divisors (see below), whose sum is σ = 61453320. Its totient is φ = 60746616.

The previous prime is 61099949. The next prime is 61099981. The reversal of 61099967 is 76999016.

It is a happy number.

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 61099967 - 2¹⁰ = 61098943 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 (61099867) 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, 176417 + ... + 176762.

It is an arithmetic number, because the mean of its divisors is an integer number (15363330).

Almost surely, 2^61099967 is an apocalyptic number.

61099967 is a deficient number, since it is larger than the sum of its proper divisors (353353).

61099967 is a wasteful number, since it uses less digits than its factorization.

61099967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353352.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 61099967 is about 7816.6467874658. The cubic root of 61099967 is about 393.8646390983.

The spelling of 61099967 in words is "sixty-one million, ninety-nine thousand, nine hundred sixty-seven".