400374109 has 4 divisors (see below), whose sum is σ = 400427104. Its totient is φ = 400321116.

The previous prime is 400374101. The next prime is 400374119. The reversal of 400374109 is 901473004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400374109 - 2³ = 400374101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400374101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12807 + ... + 31060.

It is an arithmetic number, because the mean of its divisors is an integer number (100106776).

Almost surely, 2^400374109 is an apocalyptic number.

It is an amenable number.

400374109 is a deficient number, since it is larger than the sum of its proper divisors (52995).

400374109 is an equidigital number, since it uses as much as digits as its factorization.

400374109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52994.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 400374109 is about 20009.3505391854. The cubic root of 400374109 is about 737.0359330430.

The spelling of 400374109 in words is "four hundred million, three hundred seventy-four thousand, one hundred nine".