76990129 has 4 divisors (see below), whose sum is σ = 77100660. Its totient is φ = 76879600.

The previous prime is 76990117. The next prime is 76990159. The reversal of 76990129 is 92109967.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92109967 = 19 ⋅4847893.

It can be written as a sum of positive squares in 2 ways, for example, as 49322529 + 27667600 = 7023^2 + 5260^2 .

It is a cyclic number.

It is not a de Polignac number, because 76990129 - 2¹³ = 76981937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76990159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54214 + ... + 55615.

It is an arithmetic number, because the mean of its divisors is an integer number (19275165).

Almost surely, 2^76990129 is an apocalyptic number.

It is an amenable number.

76990129 is a deficient number, since it is larger than the sum of its proper divisors (110531).

76990129 is a wasteful number, since it uses less digits than its factorization.

76990129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110530.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 76990129 is about 8774.4019169400. The cubic root of 76990129 is about 425.4139063401.

The spelling of 76990129 in words is "seventy-six million, nine hundred ninety thousand, one hundred twenty-nine".