774534981 has 16 divisors (see below), whose sum is σ = 1185891840. Its totient is φ = 444708720.

The previous prime is 774534967. The next prime is 774535061. The reversal of 774534981 is 189435477.

It is a happy number.

It is not a de Polignac number, because 774534981 - 2⁹ = 774534469 is a prime.

It is a super-2 number, since 2×774534981² = 1199808873585340722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 774534981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774534281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617025 + ... + 618278.

It is an arithmetic number, because the mean of its divisors is an integer number (74118240).

Almost surely, 2^774534981 is an apocalyptic number.

It is an amenable number.

774534981 is a deficient number, since it is larger than the sum of its proper divisors (411356859).

774534981 is a wasteful number, since it uses less digits than its factorization.

774534981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235336.

The product of its digits is 846720, while the sum is 48.

The square root of 774534981 is about 27830.4685731304. The cubic root of 774534981 is about 918.3615216887.

The spelling of 774534981 in words is "seven hundred seventy-four million, five hundred thirty-four thousand, nine hundred eighty-one".