1000400699 has 4 divisors (see below), whose sum is σ = 1006183536. Its totient is φ = 994617864.

The previous prime is 1000400693. The next prime is 1000400729. The reversal of 1000400699 is 9960040001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000400699 - 2¹⁶ = 1000335163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000400693) 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, 2891159 + ... + 2891504.

It is an arithmetic number, because the mean of its divisors is an integer number (251545884).

Almost surely, 2^1000400699 is an apocalyptic number.

1000400699 is a deficient number, since it is larger than the sum of its proper divisors (5782837).

1000400699 is an equidigital number, since it uses as much as digits as its factorization.

1000400699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782836.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1000400699 is about 31629.1115746238. Note that the first 3 decimals coincide. The cubic root of 1000400699 is about 1000.1335484973.

The spelling of 1000400699 in words is "one billion, four hundred thousand, six hundred ninety-nine".