97771579 has 2 divisors, whose sum is σ = 97771580. Its totient is φ = 97771578.

The previous prime is 97771543. The next prime is 97771589. The reversal of 97771579 is 97517779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97771579 - 2¹⁹ = 97247291 is a prime.

It is not a weakly prime, because it can be changed into another prime (97771519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48885789 + 48885790.

It is an arithmetic number, because the mean of its divisors is an integer number (48885790).

Almost surely, 2^97771579 is an apocalyptic number.

97771579 is a deficient number, since it is larger than the sum of its proper divisors (1).

97771579 is an equidigital number, since it uses as much as digits as its factorization.

97771579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972405, while the sum is 52.

The square root of 97771579 is about 9887.9512033586. The cubic root of 97771579 is about 460.6851463000.

The spelling of 97771579 in words is "ninety-seven million, seven hundred seventy-one thousand, five hundred seventy-nine".