1000400343 has 16 divisors (see below), whose sum is σ = 1413321696. Its totient is φ = 627261440.

The previous prime is 1000400321. The next prime is 1000400347. The reversal of 1000400343 is 3430040001.

It is a cyclic number.

It is not a de Polignac number, because 1000400343 - 2¹⁴ = 1000383959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000400347) 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, 76183 + ... + 88343.

It is an arithmetic number, because the mean of its divisors is an integer number (88332606).

Almost surely, 2^1000400343 is an apocalyptic number.

1000400343 is a deficient number, since it is larger than the sum of its proper divisors (412921353).

1000400343 is a wasteful number, since it uses less digits than its factorization.

1000400343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13794.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1000400343 is about 31629.1059468964. The cubic root of 1000400343 is about 1000.1334298623.

Adding to 1000400343 its reverse (3430040001), we get a palindrome (4430440344).

The spelling of 1000400343 in words is "one billion, four hundred thousand, three hundred forty-three".