97578149 has 2 divisors, whose sum is σ = 97578150. Its totient is φ = 97578148.

The previous prime is 97578133. The next prime is 97578179. The reversal of 97578149 is 94187579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95687524 + 1890625 = 9782^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 97578149 - 2⁴ = 97578133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97578097 and 97578106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97578179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48789074 + 48789075.

It is an arithmetic number, because the mean of its divisors is an integer number (48789075).

Almost surely, 2^97578149 is an apocalyptic number.

It is an amenable number.

97578149 is a deficient number, since it is larger than the sum of its proper divisors (1).

97578149 is an equidigital number, since it uses as much as digits as its factorization.

97578149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 97578149 is about 9878.1652648657. The cubic root of 97578149 is about 460.3811412632.

The spelling of 97578149 in words is "ninety-seven million, five hundred seventy-eight thousand, one hundred forty-nine".