97420987 has 2 divisors, whose sum is σ = 97420988. Its totient is φ = 97420986.

The previous prime is 97420969. The next prime is 97421041. The reversal of 97420987 is 78902479.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97420987 - 2¹¹ = 97418939 is a prime.

It is not a weakly prime, because it can be changed into another prime (97420927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48710493 + 48710494.

It is an arithmetic number, because the mean of its divisors is an integer number (48710494).

Almost surely, 2^97420987 is an apocalyptic number.

97420987 is a deficient number, since it is larger than the sum of its proper divisors (1).

97420987 is an equidigital number, since it uses as much as digits as its factorization.

97420987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 97420987 is about 9870.2070393685. The cubic root of 97420987 is about 460.1338410162.

The spelling of 97420987 in words is "ninety-seven million, four hundred twenty thousand, nine hundred eighty-seven".