1011933821 has 2 divisors, whose sum is σ = 1011933822. Its totient is φ = 1011933820.

The previous prime is 1011933809. The next prime is 1011933851. The reversal of 1011933821 is 1283391101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978813796 + 33120025 = 31286^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011933821 - 2¹⁰ = 1011932797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011933851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505966910 + 505966911.

It is an arithmetic number, because the mean of its divisors is an integer number (505966911).

Almost surely, 2^1011933821 is an apocalyptic number.

It is an amenable number.

1011933821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011933821 is an equidigital number, since it uses as much as digits as its factorization.

1011933821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1011933821 is about 31810.9072646475. The cubic root of 1011933821 is about 1003.9622204082.

The spelling of 1011933821 in words is "one billion, eleven million, nine hundred thirty-three thousand, eight hundred twenty-one".