400415087 has 2 divisors, whose sum is σ = 400415088. Its totient is φ = 400415086.

The previous prime is 400415083. The next prime is 400415089. The reversal of 400415087 is 780514004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400415087 - 2² = 400415083 is a prime.

Together with 400415089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400415083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200207543 + 200207544.

It is an arithmetic number, because the mean of its divisors is an integer number (200207544).

Almost surely, 2^400415087 is an apocalyptic number.

400415087 is a deficient number, since it is larger than the sum of its proper divisors (1).

400415087 is an equidigital number, since it uses as much as digits as its factorization.

400415087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 400415087 is about 20010.3744842519. The cubic root of 400415087 is about 737.0610772165.

It can be divided in two parts, 4004 and 15087, that added together give a palindrome (19091).

The spelling of 400415087 in words is "four hundred million, four hundred fifteen thousand, eighty-seven".