61130999 has 4 divisors (see below), whose sum is σ = 64348440. Its totient is φ = 57913560.

The previous prime is 61130989. The next prime is 61131011. The reversal of 61130999 is 99903116.

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 61130999 - 2¹² = 61126903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61130969) 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, 1608692 + ... + 1608729.

It is an arithmetic number, because the mean of its divisors is an integer number (16087110).

Almost surely, 2^61130999 is an apocalyptic number.

61130999 is a deficient number, since it is larger than the sum of its proper divisors (3217441).

61130999 is a wasteful number, since it uses less digits than its factorization.

61130999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217440.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 61130999 is about 7818.6315298778. The cubic root of 61130999 is about 393.9313076496.

The spelling of 61130999 in words is "sixty-one million, one hundred thirty thousand, nine hundred ninety-nine".