61894117 has 2 divisors, whose sum is σ = 61894118. Its totient is φ = 61894116.

The previous prime is 61894109. The next prime is 61894121. The reversal of 61894117 is 71149816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48011041 + 13883076 = 6929^2 + 3726^2 .

It is a cyclic number.

It is not a de Polignac number, because 61894117 - 2³ = 61894109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61894177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30947058 + 30947059.

It is an arithmetic number, because the mean of its divisors is an integer number (30947059).

Almost surely, 2^61894117 is an apocalyptic number.

It is an amenable number.

61894117 is a deficient number, since it is larger than the sum of its proper divisors (1).

61894117 is an equidigital number, since it uses as much as digits as its factorization.

61894117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 61894117 is about 7867.2814237194. The cubic root of 61894117 is about 395.5637242868.

The spelling of 61894117 in words is "sixty-one million, eight hundred ninety-four thousand, one hundred seventeen".