75721469 has 2 divisors, whose sum is σ = 75721470. Its totient is φ = 75721468.

The previous prime is 75721463. The next prime is 75721511. The reversal of 75721469 is 96412757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64995844 + 10725625 = 8062^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 75721469 - 2⁴ = 75721453 is a prime.

It is a super-2 number, since 2×75721469² = 11467481735035922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75721463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37860734 + 37860735.

It is an arithmetic number, because the mean of its divisors is an integer number (37860735).

Almost surely, 2^75721469 is an apocalyptic number.

It is an amenable number.

75721469 is a deficient number, since it is larger than the sum of its proper divisors (1).

75721469 is an equidigital number, since it uses as much as digits as its factorization.

75721469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 75721469 is about 8701.8083752746. The cubic root of 75721469 is about 423.0642652649.

The spelling of 75721469 in words is "seventy-five million, seven hundred twenty-one thousand, four hundred sixty-nine".