97872149 has 2 divisors, whose sum is σ = 97872150. Its totient is φ = 97872148.

The previous prime is 97872083. The next prime is 97872157. The reversal of 97872149 is 94127879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 12180100 = 9257^2 + 3490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97872149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97871149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48936074 + 48936075.

It is an arithmetic number, because the mean of its divisors is an integer number (48936075).

Almost surely, 2^97872149 is an apocalyptic number.

It is an amenable number.

97872149 is a deficient number, since it is larger than the sum of its proper divisors (1).

97872149 is an equidigital number, since it uses as much as digits as its factorization.

97872149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 97872149 is about 9893.0353784872. The cubic root of 97872149 is about 460.8430491350.

The spelling of 97872149 in words is "ninety-seven million, eight hundred seventy-two thousand, one hundred forty-nine".