97144309 has 2 divisors, whose sum is σ = 97144310. Its totient is φ = 97144308.

The previous prime is 97144303. The next prime is 97144331. The reversal of 97144309 is 90344179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96236100 + 908209 = 9810^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 97144309 - 2²³ = 88755701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97144303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48572154 + 48572155.

It is an arithmetic number, because the mean of its divisors is an integer number (48572155).

Almost surely, 2^97144309 is an apocalyptic number.

It is an amenable number.

97144309 is a deficient number, since it is larger than the sum of its proper divisors (1).

97144309 is an equidigital number, since it uses as much as digits as its factorization.

97144309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 97144309 is about 9856.1812584794. The cubic root of 97144309 is about 459.6978308523.

The spelling of 97144309 in words is "ninety-seven million, one hundred forty-four thousand, three hundred nine".