1000676781 has 64 divisors (see below), whose sum is σ = 1691872000. Its totient is φ = 579467520.

The previous prime is 1000676771. The next prime is 1000676783. The reversal of 1000676781 is 1876760001.

It is a happy number.

It is not a de Polignac number, because 1000676781 - 2⁵ = 1000676749 is a prime.

It is a super-2 number, since 2×1000676781² = 2002708040065043922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000676783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1206675 + ... + 1207503.

It is an arithmetic number, because the mean of its divisors is an integer number (26435500).

Almost surely, 2^1000676781 is an apocalyptic number.

It is an amenable number.

1000676781 is a deficient number, since it is larger than the sum of its proper divisors (691195219).

1000676781 is a wasteful number, since it uses less digits than its factorization.

1000676781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1000676781 is about 31633.4756389493. The cubic root of 1000676781 is about 1000.2255427933.

The spelling of 1000676781 in words is "one billion, six hundred seventy-six thousand, seven hundred eighty-one".