774197987 has 4 divisors (see below), whose sum is σ = 785102256. Its totient is φ = 763293720.

The previous prime is 774197971. The next prime is 774198017. The reversal of 774197987 is 789791477.

774197987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789791477 = 587 ⋅1345471.

It is a cyclic number.

It is not a de Polignac number, because 774197987 - 2⁴ = 774197971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (774197887) 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, 5452028 + ... + 5452169.

It is an arithmetic number, because the mean of its divisors is an integer number (196275564).

Almost surely, 2^774197987 is an apocalyptic number.

774197987 is a deficient number, since it is larger than the sum of its proper divisors (10904269).

774197987 is a wasteful number, since it uses less digits than its factorization.

774197987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10904268.

The product of its digits is 6223392, while the sum is 59.

The square root of 774197987 is about 27824.4135068468. The cubic root of 774197987 is about 918.2283117732.

The spelling of 774197987 in words is "seven hundred seventy-four million, one hundred ninety-seven thousand, nine hundred eighty-seven".