61294109 has 2 divisors, whose sum is σ = 61294110. Its totient is φ = 61294108.

The previous prime is 61294091. The next prime is 61294111. The reversal of 61294109 is 90149216.

Together with previous prime (61294091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 5866084 = 7445^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 61294109 - 2¹² = 61290013 is a prime.

Together with 61294111, it forms a pair of twin primes.

It is a Chen prime.

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

It is equal to p_3634349 and since 61294109 and 3634349 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61290109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30647054 + 30647055.

It is an arithmetic number, because the mean of its divisors is an integer number (30647055).

Almost surely, 2^61294109 is an apocalyptic number.

It is an amenable number.

61294109 is a deficient number, since it is larger than the sum of its proper divisors (1).

61294109 is an equidigital number, since it uses as much as digits as its factorization.

61294109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 61294109 is about 7829.0554347252. The cubic root of 61294109 is about 394.2813595790.

The spelling of 61294109 in words is "sixty-one million, two hundred ninety-four thousand, one hundred nine".