921052487 has 2 divisors, whose sum is σ = 921052488. Its totient is φ = 921052486.

The previous prime is 921052477. The next prime is 921052511. The reversal of 921052487 is 784250129.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921052487 - 2²⁰ = 920003911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 921052487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921052477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460526243 + 460526244.

It is an arithmetic number, because the mean of its divisors is an integer number (460526244).

Almost surely, 2^921052487 is an apocalyptic number.

921052487 is a deficient number, since it is larger than the sum of its proper divisors (1).

921052487 is an equidigital number, since it uses as much as digits as its factorization.

921052487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 921052487 is about 30348.8465513930. The cubic root of 921052487 is about 972.9595678835.

The spelling of 921052487 in words is "nine hundred twenty-one million, fifty-two thousand, four hundred eighty-seven".