1973158019 has 6 divisors (see below), whose sum is σ = 2295306324. Its totient is φ = 1691278260.

The previous prime is 1973158013. The next prime is 1973158039. The reversal of 1973158019 is 9108513791.

It is a de Polignac number, because none of the positive numbers 2^k-1973158019 is a prime.

It is a super-2 number, since 2×1973158019² = 7786705135888008722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1973158013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20134217 + ... + 20134314.

It is an arithmetic number, because the mean of its divisors is an integer number (382551054).

Almost surely, 2^1973158019 is an apocalyptic number.

1973158019 is a deficient number, since it is larger than the sum of its proper divisors (322148305).

1973158019 is an equidigital number, since it uses as much as digits as its factorization.

1973158019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40268545 (or 40268538 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1973158019 is about 44420.2433469246. The cubic root of 1973158019 is about 1254.2591817337.

The spelling of 1973158019 in words is "one billion, nine hundred seventy-three million, one hundred fifty-eight thousand, nineteen".