76906309 has 2 divisors, whose sum is σ = 76906310. Its totient is φ = 76906308.

The previous prime is 76906307. The next prime is 76906369. The reversal of 76906309 is 90360967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68525284 + 8381025 = 8278^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 76906309 - 2¹ = 76906307 is a prime.

Together with 76906307, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76906307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38453154 + 38453155.

It is an arithmetic number, because the mean of its divisors is an integer number (38453155).

Almost surely, 2^76906309 is an apocalyptic number.

It is an amenable number.

76906309 is a deficient number, since it is larger than the sum of its proper divisors (1).

76906309 is an equidigital number, since it uses as much as digits as its factorization.

76906309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 76906309 is about 8769.6242222800. The cubic root of 76906309 is about 425.2594660138.

The spelling of 76906309 in words is "seventy-six million, nine hundred six thousand, three hundred nine".