1921946479 has 2 divisors, whose sum is σ = 1921946480. Its totient is φ = 1921946478.

The previous prime is 1921946443. The next prime is 1921946483. The reversal of 1921946479 is 9746491291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921946479 - 2¹⁵ = 1921913711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921946879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960973239 + 960973240.

It is an arithmetic number, because the mean of its divisors is an integer number (960973240).

Almost surely, 2^1921946479 is an apocalyptic number.

1921946479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921946479 is an equidigital number, since it uses as much as digits as its factorization.

1921946479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 1921946479 is about 43840.0100250901. The cubic root of 1921946479 is about 1243.3128718339.

The spelling of 1921946479 in words is "one billion, nine hundred twenty-one million, nine hundred forty-six thousand, four hundred seventy-nine".