921148790 has 16 divisors (see below), whose sum is σ = 1658490768. Its totient is φ = 368365536.

The previous prime is 921148751. The next prime is 921148793. The reversal of 921148790 is 97841129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921148793) 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, 40469 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (103655673).

Almost surely, 2^921148790 is an apocalyptic number.

921148790 is a deficient number, since it is larger than the sum of its proper divisors (737341978).

921148790 is a wasteful number, since it uses less digits than its factorization.

921148790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23503.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 921148790 is about 30350.4331105834. The cubic root of 921148790 is about 972.9934767942.

The spelling of 921148790 in words is "nine hundred twenty-one million, one hundred forty-eight thousand, seven hundred ninety".