61883561 has 2 divisors, whose sum is σ = 61883562. Its totient is φ = 61883560.

The previous prime is 61883531. The next prime is 61883567. The reversal of 61883561 is 16538816.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 7123561 = 7400^2 + 2669^2 .

It is a cyclic number.

It is not a de Polignac number, because 61883561 - 2¹⁴ = 61867177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61883567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30941780 + 30941781.

It is an arithmetic number, because the mean of its divisors is an integer number (30941781).

Almost surely, 2^61883561 is an apocalyptic number.

It is an amenable number.

61883561 is a deficient number, since it is larger than the sum of its proper divisors (1).

61883561 is an equidigital number, since it uses as much as digits as its factorization.

61883561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 61883561 is about 7866.6105153363. The cubic root of 61883561 is about 395.5412352993.

The spelling of 61883561 in words is "sixty-one million, eight hundred eighty-three thousand, five hundred sixty-one".