977484781 has 12 divisors (see below), whose sum is σ = 1224542172. Its totient is φ = 773394048.

The previous prime is 977484779. The next prime is 977484791. The reversal of 977484781 is 187484779.

It can be written as a sum of positive squares in 2 ways, for example, as 50282281 + 927202500 = 7091^2 + 30450^2 .

It is not a de Polignac number, because 977484781 - 2¹ = 977484779 is a prime.

It is a super-2 number, since 2×977484781² = 1910952994173235922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977484721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 766620 + ... + 767893.

It is an arithmetic number, because the mean of its divisors is an integer number (102045181).

Almost surely, 2^977484781 is an apocalyptic number.

977484781 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

977484781 is a deficient number, since it is larger than the sum of its proper divisors (247057391).

977484781 is a wasteful number, since it uses less digits than its factorization.

977484781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534540 (or 1534533 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 55.

The square root of 977484781 is about 31264.7530135774. The cubic root of 977484781 is about 992.4378855734.

The spelling of 977484781 in words is "nine hundred seventy-seven million, four hundred eighty-four thousand, seven hundred eighty-one".