1000945031 has 4 divisors (see below), whose sum is σ = 1005316200. Its totient is φ = 996573864.

The previous prime is 1000945009. The next prime is 1000945067. The reversal of 1000945031 is 1305490001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1305490001 = 47 ⋅27776383.

It is a cyclic number.

It is not a de Polignac number, because 1000945031 - 2¹⁴ = 1000928647 is a prime.

It is a super-2 number, since 2×1000945031² = 2003781910167181922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000944988 and 1000945006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000645031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185241 + ... + 2185698.

It is an arithmetic number, because the mean of its divisors is an integer number (251329050).

Almost surely, 2^1000945031 is an apocalyptic number.

1000945031 is a deficient number, since it is larger than the sum of its proper divisors (4371169).

1000945031 is an equidigital number, since it uses as much as digits as its factorization.

1000945031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371168.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1000945031 is about 31637.7153252254. The cubic root of 1000945031 is about 1000.3149111539.

The spelling of 1000945031 in words is "one billion, nine hundred forty-five thousand, thirty-one".