97478510182021 has 2 divisors, whose sum is σ = 97478510182022. Its totient is φ = 97478510182020.

The previous prime is 97478510181989. The next prime is 97478510182037. The reversal of 97478510182021 is 12028101587479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70366848365025 + 27111661816996 = 8388495^2 + 5206886^2 .

It is a cyclic number.

It is not a de Polignac number, because 97478510182021 - 2⁵ = 97478510181989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97478510182421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48739255091010 + 48739255091011.

It is an arithmetic number, because the mean of its divisors is an integer number (48739255091011).

Almost surely, 2^{97478510182021} is an apocalyptic number.

It is an amenable number.

97478510182021 is a deficient number, since it is larger than the sum of its proper divisors (1).

97478510182021 is an equidigital number, since it uses as much as digits as its factorization.

97478510182021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The spelling of 97478510182021 in words is "ninety-seven trillion, four hundred seventy-eight billion, five hundred ten million, one hundred eighty-two thousand, twenty-one".