61621303 has 2 divisors, whose sum is σ = 61621304. Its totient is φ = 61621302.

The previous prime is 61621291. The next prime is 61621327. The reversal of 61621303 is 30312616.

61621303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61621303 - 2⁹ = 61620791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61621003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810651 + 30810652.

It is an arithmetic number, because the mean of its divisors is an integer number (30810652).

Almost surely, 2^61621303 is an apocalyptic number.

61621303 is a deficient number, since it is larger than the sum of its proper divisors (1).

61621303 is an equidigital number, since it uses as much as digits as its factorization.

61621303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 61621303 is about 7849.9237575915. The cubic root of 61621303 is about 394.9816858464.

Adding to 61621303 its reverse (30312616), we get a palindrome (91933919).

The spelling of 61621303 in words is "sixty-one million, six hundred twenty-one thousand, three hundred three".