770489129 has 4 divisors (see below), whose sum is σ = 770654676. Its totient is φ = 770323584.

The previous prime is 770489119. The next prime is 770489141. The reversal of 770489129 is 921984077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921984077 = 7 ⋅131712011.

It can be written as a sum of positive squares in 2 ways, for example, as 369408400 + 401080729 = 19220^2 + 20027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-770489129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770489119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75584 + ... + 85169.

It is an arithmetic number, because the mean of its divisors is an integer number (192663669).

Almost surely, 2^770489129 is an apocalyptic number.

It is an amenable number.

770489129 is a deficient number, since it is larger than the sum of its proper divisors (165547).

770489129 is a wasteful number, since it uses less digits than its factorization.

770489129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165546.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 770489129 is about 27757.6859446172. The cubic root of 770489129 is about 916.7596817716.

The spelling of 770489129 in words is "seven hundred seventy million, four hundred eighty-nine thousand, one hundred twenty-nine".