97854106309 has 2 divisors, whose sum is σ = 97854106310. Its totient is φ = 97854106308.

The previous prime is 97854106253. The next prime is 97854106319. The reversal of 97854106309 is 90360145879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75564512100 + 22289594209 = 274890^2 + 149297^2 .

It is a cyclic number.

It is not a de Polignac number, because 97854106309 - 2²⁵ = 97820551877 is a prime.

It is a super-2 number, since 2×97854106309² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97854106319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48927053154 + 48927053155.

It is an arithmetic number, because the mean of its divisors is an integer number (48927053155).

Almost surely, 2^97854106309 is an apocalyptic number.

It is an amenable number.

97854106309 is a deficient number, since it is larger than the sum of its proper divisors (1).

97854106309 is an equidigital number, since it uses as much as digits as its factorization.

97854106309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 97854106309 in words is "ninety-seven billion, eight hundred fifty-four million, one hundred six thousand, three hundred nine".