76561403 has 2 divisors, whose sum is σ = 76561404. Its totient is φ = 76561402.

The previous prime is 76561361. The next prime is 76561423. The reversal of 76561403 is 30416567.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76561403 - 2¹⁸ = 76299259 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76561403.

It is not a weakly prime, because it can be changed into another prime (76561423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38280701 + 38280702.

It is an arithmetic number, because the mean of its divisors is an integer number (38280702).

Almost surely, 2^76561403 is an apocalyptic number.

76561403 is a deficient number, since it is larger than the sum of its proper divisors (1).

76561403 is an equidigital number, since it uses as much as digits as its factorization.

76561403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 76561403 is about 8749.9373140612. The cubic root of 76561403 is about 424.6227850196.

The spelling of 76561403 in words is "seventy-six million, five hundred sixty-one thousand, four hundred three".