906986781 has 16 divisors (see below), whose sum is σ = 1344198720. Its totient is φ = 604426320.

The previous prime is 906986779. The next prime is 906986813. The reversal of 906986781 is 187689609.

906986781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 906986781 - 2¹ = 906986779 is a prime.

It is a super-2 number, since 2×906986781² = 1645250041817483922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906986701) 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, 93751 + ... + 102971.

It is an arithmetic number, because the mean of its divisors is an integer number (84012420).

Almost surely, 2^906986781 is an apocalyptic number.

It is an amenable number.

906986781 is a deficient number, since it is larger than the sum of its proper divisors (437211939).

906986781 is a wasteful number, since it uses less digits than its factorization.

906986781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12873 (or 12867 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 906986781 is about 30116.2212271062. The cubic root of 906986781 is about 967.9813409222.

It can be divided in two parts, 90698 and 6781, that added together give a palindrome (97479).

The spelling of 906986781 in words is "nine hundred six million, nine hundred eighty-six thousand, seven hundred eighty-one".