61864403 has 2 divisors, whose sum is σ = 61864404. Its totient is φ = 61864402.

The previous prime is 61864379. The next prime is 61864421. The reversal of 61864403 is 30446816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61864403 - 2⁸ = 61864147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61864403.

It is not a weakly prime, because it can be changed into another prime (61864463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30932201 + 30932202.

It is an arithmetic number, because the mean of its divisors is an integer number (30932202).

Almost surely, 2^61864403 is an apocalyptic number.

61864403 is a deficient number, since it is larger than the sum of its proper divisors (1).

61864403 is an equidigital number, since it uses as much as digits as its factorization.

61864403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 61864403 is about 7865.3927428959. The cubic root of 61864403 is about 395.5004136822.

The spelling of 61864403 in words is "sixty-one million, eight hundred sixty-four thousand, four hundred three".