501963961 has 2 divisors, whose sum is σ = 501963962. Its totient is φ = 501963960.

The previous prime is 501963949. The next prime is 501963977. The reversal of 501963961 is 169369105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400760361 + 101203600 = 20019^2 + 10060^2 .

It is a cyclic number.

It is not a de Polignac number, because 501963961 - 2¹⁵ = 501931193 is a prime.

It is not a weakly prime, because it can be changed into another prime (501963991) 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, 250981980 + 250981981.

It is an arithmetic number, because the mean of its divisors is an integer number (250981981).

Almost surely, 2^501963961 is an apocalyptic number.

It is an amenable number.

501963961 is a deficient number, since it is larger than the sum of its proper divisors (1).

501963961 is an equidigital number, since it uses as much as digits as its factorization.

501963961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 501963961 is about 22404.5522383287. The cubic root of 501963961 is about 794.7383662352.

The spelling of 501963961 in words is "five hundred one million, nine hundred sixty-three thousand, nine hundred sixty-one".