76387481 has 2 divisors, whose sum is σ = 76387482. Its totient is φ = 76387480.

The previous prime is 76387463. The next prime is 76387483. The reversal of 76387481 is 18478367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 3455881 = 8540^2 + 1859^2 .

It is an emirp because it is prime and its reverse (18478367) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76387481 - 2⁶ = 76387417 is a prime.

It is a super-2 number, since 2×76387481² = 11670094507050722, which contains 22 as substring.

Together with 76387483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76387483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38193740 + 38193741.

It is an arithmetic number, because the mean of its divisors is an integer number (38193741).

Almost surely, 2^76387481 is an apocalyptic number.

It is an amenable number.

76387481 is a deficient number, since it is larger than the sum of its proper divisors (1).

76387481 is an equidigital number, since it uses as much as digits as its factorization.

76387481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 76387481 is about 8739.9931922170. The cubic root of 76387481 is about 424.3010074066.

The spelling of 76387481 in words is "seventy-six million, three hundred eighty-seven thousand, four hundred eighty-one".