921486970 has 16 divisors (see below), whose sum is σ = 1659030408. Its totient is φ = 368516160.

The previous prime is 921486967. The next prime is 921487001. The reversal of 921486970 is 79684129.

It can be written as a sum of positive squares in 4 ways, for example, as 634082761 + 287404209 = 25181^2 + 16953^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 921486970.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71200 + ... + 83140.

Almost surely, 2^921486970 is an apocalyptic number.

921486970 is a deficient number, since it is larger than the sum of its proper divisors (737543438).

921486970 is a wasteful number, since it uses less digits than its factorization.

921486970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19665.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 921486970 is about 30356.0038542625. The cubic root of 921486970 is about 973.1125334469.

The spelling of 921486970 in words is "nine hundred twenty-one million, four hundred eighty-six thousand, nine hundred seventy".