1673412662021 has 2 divisors, whose sum is σ = 1673412662022. Its totient is φ = 1673412662020.

The previous prime is 1673412661939. The next prime is 1673412662023. The reversal of 1673412662021 is 1202662143761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070283357025 + 603129304996 = 1034545^2 + 776614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1673412662021 is a prime.

It is a Sophie Germain prime.

Together with 1673412662023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1673412662021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673412662023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836706331010 + 836706331011.

It is an arithmetic number, because the mean of its divisors is an integer number (836706331011).

Almost surely, 2^{1673412662021} is an apocalyptic number.

It is an amenable number.

1673412662021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673412662021 is an equidigital number, since it uses as much as digits as its factorization.

1673412662021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 1673412662021 in words is "one trillion, six hundred seventy-three billion, four hundred twelve million, six hundred sixty-two thousand, twenty-one".