61110409 has 2 divisors, whose sum is σ = 61110410. Its totient is φ = 61110408.

The previous prime is 61110397. The next prime is 61110473. The reversal of 61110409 is 90401116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 8982009 = 7220^2 + 2997^2 .

It is a cyclic number.

It is not a de Polignac number, because 61110409 - 2¹⁷ = 60979337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61110409.

It is not a weakly prime, because it can be changed into another prime (61110509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555204 + 30555205.

It is an arithmetic number, because the mean of its divisors is an integer number (30555205).

Almost surely, 2^61110409 is an apocalyptic number.

It is an amenable number.

61110409 is a deficient number, since it is larger than the sum of its proper divisors (1).

61110409 is an equidigital number, since it uses as much as digits as its factorization.

61110409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 61110409 is about 7817.3146923992. The cubic root of 61110409 is about 393.8870750095.

The spelling of 61110409 in words is "sixty-one million, one hundred ten thousand, four hundred nine".