921770963 has 2 divisors, whose sum is σ = 921770964. Its totient is φ = 921770962.

The previous prime is 921770911. The next prime is 921770981. The reversal of 921770963 is 369077129.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921770963 - 2²² = 917576659 is a prime.

It is not a weakly prime, because it can be changed into another prime (921775963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460885481 + 460885482.

It is an arithmetic number, because the mean of its divisors is an integer number (460885482).

Almost surely, 2^921770963 is an apocalyptic number.

921770963 is a deficient number, since it is larger than the sum of its proper divisors (1).

921770963 is an equidigital number, since it uses as much as digits as its factorization.

921770963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 921770963 is about 30360.6812011852. The cubic root of 921770963 is about 973.2124910052.

The spelling of 921770963 in words is "nine hundred twenty-one million, seven hundred seventy thousand, nine hundred sixty-three".