400825793 has 4 divisors (see below), whose sum is σ = 401613780. Its totient is φ = 400037808.

The previous prime is 400825787. The next prime is 400825801. The reversal of 400825793 is 397528004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 182466064 + 218359729 = 13508^2 + 14777^2 .

It is a cyclic number.

It is not a de Polignac number, because 400825793 - 2¹⁸ = 400563649 is a prime.

It is a super-2 number, since 2×400825793² = 321322632668157698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400825703) 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, 393230 + ... + 394247.

It is an arithmetic number, because the mean of its divisors is an integer number (100403445).

Almost surely, 2^400825793 is an apocalyptic number.

It is an amenable number.

400825793 is a deficient number, since it is larger than the sum of its proper divisors (787987).

400825793 is an equidigital number, since it uses as much as digits as its factorization.

400825793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787986.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 400825793 is about 20020.6341807646. The cubic root of 400825793 is about 737.3129924390.

The spelling of 400825793 in words is "four hundred million, eight hundred twenty-five thousand, seven hundred ninety-three".