773420987 has 4 divisors (see below), whose sum is σ = 779325096. Its totient is φ = 767516880.

The previous prime is 773420941. The next prime is 773421031. The reversal of 773420987 is 789024377.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 773420987 - 2¹⁰ = 773419963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773420387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2951858 + ... + 2952119.

It is an arithmetic number, because the mean of its divisors is an integer number (194831274).

Almost surely, 2^773420987 is an apocalyptic number.

773420987 is a deficient number, since it is larger than the sum of its proper divisors (5904109).

773420987 is a wasteful number, since it uses less digits than its factorization.

773420987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904108.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 773420987 is about 27810.4474433620. The cubic root of 773420987 is about 917.9210250820.

The spelling of 773420987 in words is "seven hundred seventy-three million, four hundred twenty thousand, nine hundred eighty-seven".