1941802921 has 2 divisors, whose sum is σ = 1941802922. Its totient is φ = 1941802920.

The previous prime is 1941802897. The next prime is 1941802997. The reversal of 1941802921 is 1292081491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871427600 + 70375321 = 43260^2 + 8389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941802921 - 2²³ = 1933414313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1941872921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970901460 + 970901461.

It is an arithmetic number, because the mean of its divisors is an integer number (970901461).

Almost surely, 2^1941802921 is an apocalyptic number.

It is an amenable number.

1941802921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941802921 is an equidigital number, since it uses as much as digits as its factorization.

1941802921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1941802921 is about 44065.8929445439. The cubic root of 1941802921 is about 1247.5799408212.

The spelling of 1941802921 in words is "one billion, nine hundred forty-one million, eight hundred two thousand, nine hundred twenty-one".