1978462019 has 2 divisors, whose sum is σ = 1978462020. Its totient is φ = 1978462018.

The previous prime is 1978461997. The next prime is 1978462027. The reversal of 1978462019 is 9102648791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1978462019 - 2⁸ = 1978461763 is a prime.

It is a super-2 number, since 2×1978462019² = 7828623921251112722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1978462219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989231009 + 989231010.

It is an arithmetic number, because the mean of its divisors is an integer number (989231010).

Almost surely, 2^1978462019 is an apocalyptic number.

1978462019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978462019 is an equidigital number, since it uses as much as digits as its factorization.

1978462019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1978462019 is about 44479.9057890189. The cubic root of 1978462019 is about 1255.3820245118.

The spelling of 1978462019 in words is "one billion, nine hundred seventy-eight million, four hundred sixty-two thousand, nineteen".