929791921 has 2 divisors, whose sum is σ = 929791922. Its totient is φ = 929791920.

The previous prime is 929791901. The next prime is 929791927. The reversal of 929791921 is 129197929.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864360000 + 65431921 = 29400^2 + 8089^2 .

It is a cyclic number.

It is not a de Polignac number, because 929791921 - 2²¹ = 927694769 is a prime.

It is not a weakly prime, because it can be changed into another prime (929791927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464895960 + 464895961.

It is an arithmetic number, because the mean of its divisors is an integer number (464895961).

Almost surely, 2^929791921 is an apocalyptic number.

It is an amenable number.

929791921 is a deficient number, since it is larger than the sum of its proper divisors (1).

929791921 is an equidigital number, since it uses as much as digits as its factorization.

929791921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 49.

The square root of 929791921 is about 30492.4895835024. The cubic root of 929791921 is about 976.0272044201.

The spelling of 929791921 in words is "nine hundred twenty-nine million, seven hundred ninety-one thousand, nine hundred twenty-one".