400773887 has 2 divisors, whose sum is σ = 400773888. Its totient is φ = 400773886.

The previous prime is 400773871. The next prime is 400773931. The reversal of 400773887 is 788377004.

It is an a-pointer prime, because the next prime (400773931) can be obtained adding 400773887 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400773887 - 2⁴ = 400773871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400773787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200386943 + 200386944.

It is an arithmetic number, because the mean of its divisors is an integer number (200386944).

Almost surely, 2^400773887 is an apocalyptic number.

400773887 is a deficient number, since it is larger than the sum of its proper divisors (1).

400773887 is an equidigital number, since it uses as much as digits as its factorization.

400773887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 400773887 is about 20019.3378262119. The cubic root of 400773887 is about 737.2811642974.

The spelling of 400773887 in words is "four hundred million, seven hundred seventy-three thousand, eight hundred eighty-seven".