97861807 has 2 divisors, whose sum is σ = 97861808. Its totient is φ = 97861806.

The previous prime is 97861787. The next prime is 97861811. The reversal of 97861807 is 70816879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97861807 - 2¹⁹ = 97337519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97861817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48930903 + 48930904.

It is an arithmetic number, because the mean of its divisors is an integer number (48930904).

Almost surely, 2^97861807 is an apocalyptic number.

97861807 is a deficient number, since it is larger than the sum of its proper divisors (1).

97861807 is an equidigital number, since it uses as much as digits as its factorization.

97861807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 97861807 is about 9892.5126737346. The cubic root of 97861807 is about 460.8268163703.

The spelling of 97861807 in words is "ninety-seven million, eight hundred sixty-one thousand, eight hundred seven".