76906639 has 2 divisors, whose sum is σ = 76906640. Its totient is φ = 76906638.

The previous prime is 76906619. The next prime is 76906667. The reversal of 76906639 is 93660967.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76906639 - 2¹³ = 76898447 is a prime.

It is a super-2 number, since 2×76906639² = 11829262244552642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76906619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38453319 + 38453320.

It is an arithmetic number, because the mean of its divisors is an integer number (38453320).

Almost surely, 2^76906639 is an apocalyptic number.

76906639 is a deficient number, since it is larger than the sum of its proper divisors (1).

76906639 is an equidigital number, since it uses as much as digits as its factorization.

76906639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 76906639 is about 8769.6430372051. The cubic root of 76906639 is about 425.2600742665.

The spelling of 76906639 in words is "seventy-six million, nine hundred six thousand, six hundred thirty-nine".