76503409 has 2 divisors, whose sum is σ = 76503410. Its totient is φ = 76503408.

The previous prime is 76503391. The next prime is 76503461. The reversal of 76503409 is 90430567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 15429184 = 7815^2 + 3928^2 .

It is an emirp because it is prime and its reverse (90430567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76503409 - 2⁵ = 76503377 is a prime.

It is equal to p_4477192 and since 76503409 and 4477192 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (76503109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38251704 + 38251705.

It is an arithmetic number, because the mean of its divisors is an integer number (38251705).

Almost surely, 2^76503409 is an apocalyptic number.

It is an amenable number.

76503409 is a deficient number, since it is larger than the sum of its proper divisors (1).

76503409 is an equidigital number, since it uses as much as digits as its factorization.

76503409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 76503409 is about 8746.6227196559. The cubic root of 76503409 is about 424.5155430183.

The spelling of 76503409 in words is "seventy-six million, five hundred three thousand, four hundred nine".