61183921 has 2 divisors, whose sum is σ = 61183922. Its totient is φ = 61183920.

The previous prime is 61183891. The next prime is 61183937. The reversal of 61183921 is 12938116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 24750625 = 6036^2 + 4975^2 .

It is a cyclic number.

It is not a de Polignac number, because 61183921 - 2¹³ = 61175729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61183121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30591960 + 30591961.

It is an arithmetic number, because the mean of its divisors is an integer number (30591961).

Almost surely, 2^61183921 is an apocalyptic number.

It is an amenable number.

61183921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61183921 is an equidigital number, since it uses as much as digits as its factorization.

61183921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 61183921 is about 7822.0151495634. The cubic root of 61183921 is about 394.0449522264.

The spelling of 61183921 in words is "sixty-one million, one hundred eighty-three thousand, nine hundred twenty-one".