921100087 has 2 divisors, whose sum is σ = 921100088. Its totient is φ = 921100086.

The previous prime is 921100051. The next prime is 921100099. The reversal of 921100087 is 780001129.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921100087 - 2¹¹ = 921098039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921100007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460550043 + 460550044.

It is an arithmetic number, because the mean of its divisors is an integer number (460550044).

Almost surely, 2^921100087 is an apocalyptic number.

921100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

921100087 is an equidigital number, since it uses as much as digits as its factorization.

921100087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 921100087 is about 30349.6307555792. The cubic root of 921100087 is about 972.9763284475.

The spelling of 921100087 in words is "nine hundred twenty-one million, one hundred thousand, eighty-seven".