75721463 has 2 divisors, whose sum is σ = 75721464. Its totient is φ = 75721462.

The previous prime is 75721453. The next prime is 75721469. The reversal of 75721463 is 36412757.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75721463 - 2⁴ = 75721447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75721469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37860731 + 37860732.

It is an arithmetic number, because the mean of its divisors is an integer number (37860732).

Almost surely, 2^75721463 is an apocalyptic number.

75721463 is a deficient number, since it is larger than the sum of its proper divisors (1).

75721463 is an equidigital number, since it uses as much as digits as its factorization.

75721463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 35.

The square root of 75721463 is about 8701.8080305187. The cubic root of 75721463 is about 423.0642540906.

The spelling of 75721463 in words is "seventy-five million, seven hundred twenty-one thousand, four hundred sixty-three".