1973614021 has 2 divisors, whose sum is σ = 1973614022. Its totient is φ = 1973614020.

The previous prime is 1973613973. The next prime is 1973614063. The reversal of 1973614021 is 1204163791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1350562500 + 623051521 = 36750^2 + 24961^2 .

It is an emirp because it is prime and its reverse (1204163791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1973614021 - 2²³ = 1965225413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973414021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986807010 + 986807011.

It is an arithmetic number, because the mean of its divisors is an integer number (986807011).

Almost surely, 2^1973614021 is an apocalyptic number.

It is an amenable number.

1973614021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973614021 is an equidigital number, since it uses as much as digits as its factorization.

1973614021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1973614021 is about 44425.3758678528. The cubic root of 1973614021 is about 1254.3557951552.

The spelling of 1973614021 in words is "one billion, nine hundred seventy-three million, six hundred fourteen thousand, twenty-one".