61009199 has 2 divisors, whose sum is σ = 61009200. Its totient is φ = 61009198.

The previous prime is 61009187. The next prime is 61009231. The reversal of 61009199 is 99190016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61009199 - 2⁴ = 61009183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61009129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30504599 + 30504600.

It is an arithmetic number, because the mean of its divisors is an integer number (30504600).

Almost surely, 2^61009199 is an apocalyptic number.

61009199 is a deficient number, since it is larger than the sum of its proper divisors (1).

61009199 is an equidigital number, since it uses as much as digits as its factorization.

61009199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 61009199 is about 7810.8385593354. The cubic root of 61009199 is about 393.6695052050.

The spelling of 61009199 in words is "sixty-one million, nine thousand, one hundred ninety-nine".