97143745 has 4 divisors (see below), whose sum is σ = 116572500. Its totient is φ = 77714992.

The previous prime is 97143721. The next prime is 97143779. The reversal of 97143745 is 54734179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54734179 = 47 ⋅1164557.

It can be written as a sum of positive squares in 2 ways, for example, as 13366336 + 83777409 = 3656^2 + 9153^2 .

It is a cyclic number.

It is not a de Polignac number, because 97143745 - 2⁷ = 97143617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97143698 and 97143707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9714370 + ... + 9714379.

It is an arithmetic number, because the mean of its divisors is an integer number (29143125).

Almost surely, 2^97143745 is an apocalyptic number.

It is an amenable number.

97143745 is a deficient number, since it is larger than the sum of its proper divisors (19428755).

97143745 is a wasteful number, since it uses less digits than its factorization.

97143745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19428754.

The product of its digits is 105840, while the sum is 40.

The square root of 97143745 is about 9856.1526469510. The cubic root of 97143745 is about 459.6969412134.

The spelling of 97143745 in words is "ninety-seven million, one hundred forty-three thousand, seven hundred forty-five".