400112387 has 2 divisors, whose sum is σ = 400112388. Its totient is φ = 400112386.

The previous prime is 400112369. The next prime is 400112389. The reversal of 400112387 is 783211004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400112387 - 2⁸ = 400112131 is a prime.

Together with 400112389, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_21341951 and since 400112387 and 21341951 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (400112389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200056193 + 200056194.

It is an arithmetic number, because the mean of its divisors is an integer number (200056194).

Almost surely, 2^400112387 is an apocalyptic number.

400112387 is a deficient number, since it is larger than the sum of its proper divisors (1).

400112387 is an equidigital number, since it uses as much as digits as its factorization.

400112387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 400112387 is about 20002.8094776709. The cubic root of 400112387 is about 736.8752994743.

The spelling of 400112387 in words is "four hundred million, one hundred twelve thousand, three hundred eighty-seven".