1009731 has 4 divisors (see below), whose sum is σ = 1346312. Its totient is φ = 673152.

The previous prime is 1009727. The next prime is 1009741. The reversal of 1009731 is 1379001.

1009731 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.

It is not a de Polignac number, because 1009731 - 2² = 1009727 is a prime.

It is a super-2 number, since 2×1009731² = 2039113384722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1009698 and 1009707.

It is not an unprimeable number, because it can be changed into a prime (1009741) 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, 168286 + ... + 168291.

It is an arithmetic number, because the mean of its divisors is an integer number (336578).

2^1009731 is an apocalyptic number.

1009731 is a deficient number, since it is larger than the sum of its proper divisors (336581).

1009731 is an equidigital number, since it uses as much as digits as its factorization.

1009731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336580.

The product of its (nonzero) digits is 189, while the sum is 21.

The square root of 1009731 is about 1004.8537206977. The cubic root of 1009731 is about 100.3233201807.

The spelling of 1009731 in words is "one million, nine thousand, seven hundred thirty-one".