921154636 has 12 divisors (see below), whose sum is σ = 1617842128. Its totient is φ = 458914032.

The previous prime is 921154621. The next prime is 921154649. The reversal of 921154636 is 636451129.

It is a junction number, because it is equal to n+sod(n) for n = 921154595 and 921154604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414576 + ... + 416791.

Almost surely, 2^921154636 is an apocalyptic number.

It is an amenable number.

921154636 is a deficient number, since it is larger than the sum of its proper divisors (696687492).

921154636 is a wasteful number, since it uses less digits than its factorization.

921154636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831648 (or 831646 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 921154636 is about 30350.5294187762. The cubic root of 921154636 is about 972.9955351327.

The spelling of 921154636 in words is "nine hundred twenty-one million, one hundred fifty-four thousand, six hundred thirty-six".