63120921 has 8 divisors (see below), whose sum is σ = 85226880. Its totient is φ = 41547792.

The previous prime is 63120899. The next prime is 63120923. The reversal of 63120921 is 12902136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63120921 - 2¹⁰ = 63119897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63120891 and 63120900.

It is not an unprimeable number, because it can be changed into a prime (63120923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132930 + ... + 133403.

It is an arithmetic number, because the mean of its divisors is an integer number (10653360).

Almost surely, 2^63120921 is an apocalyptic number.

It is an amenable number.

63120921 is a deficient number, since it is larger than the sum of its proper divisors (22105959).

63120921 is a wasteful number, since it uses less digits than its factorization.

63120921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266415.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 63120921 is about 7944.8675885757. The cubic root of 63120921 is about 398.1601356398.

The spelling of 63120921 in words is "sixty-three million, one hundred twenty thousand, nine hundred twenty-one".