76838989 has 2 divisors, whose sum is σ = 76838990. Its totient is φ = 76838988.

The previous prime is 76838977. The next prime is 76839001. The reversal of 76838989 is 98983867.

It is a balanced prime because it is at equal distance from previous prime (76838977) and next prime (76839001).

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 3736489 = 8550^2 + 1933^2 .

It is an emirp because it is prime and its reverse (98983867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76838989 - 2¹⁹ = 76314701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76838939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38419494 + 38419495.

It is an arithmetic number, because the mean of its divisors is an integer number (38419495).

Almost surely, 2^76838989 is an apocalyptic number.

It is an amenable number.

76838989 is a deficient number, since it is larger than the sum of its proper divisors (1).

76838989 is an equidigital number, since it uses as much as digits as its factorization.

76838989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The square root of 76838989 is about 8765.7851331184. The cubic root of 76838989 is about 425.1353460510.

The spelling of 76838989 in words is "seventy-six million, eight hundred thirty-eight thousand, nine hundred eighty-nine".