109078261 has 4 divisors (see below), whose sum is σ = 110097792. Its totient is φ = 108058732.

The previous prime is 109078247. The next prime is 109078271. The reversal of 109078261 is 162870901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109078261 - 2¹⁵ = 109045493 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 (109078231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509605 + ... + 509818.

It is an arithmetic number, because the mean of its divisors is an integer number (27524448).

Almost surely, 2^109078261 is an apocalyptic number.

It is an amenable number.

109078261 is a deficient number, since it is larger than the sum of its proper divisors (1019531).

109078261 is a wasteful number, since it uses less digits than its factorization.

109078261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019530.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 109078261 is about 10444.0538585360. The cubic root of 109078261 is about 477.7999153835.

The spelling of 109078261 in words is "one hundred nine million, seventy-eight thousand, two hundred sixty-one".