61276109 has 16 divisors (see below), whose sum is σ = 67557888. Its totient is φ = 55341312.

The previous prime is 61276097. The next prime is 61276133. The reversal of 61276109 is 90167216.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61276109 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61276169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41624 + ... + 43070.

It is an arithmetic number, because the mean of its divisors is an integer number (4222368).

Almost surely, 2^61276109 is an apocalyptic number.

It is an amenable number.

61276109 is a deficient number, since it is larger than the sum of its proper divisors (6281779).

61276109 is a wasteful number, since it uses less digits than its factorization.

61276109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 61276109 is about 7827.9057863518. The cubic root of 61276109 is about 394.2427601147.

The spelling of 61276109 in words is "sixty-one million, two hundred seventy-six thousand, one hundred nine".