2193407987 has 2 divisors, whose sum is σ = 2193407988. Its totient is φ = 2193407986.

The previous prime is 2193407971. The next prime is 2193408001. The reversal of 2193407987 is 7897043912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2193407987 - 2⁴ = 2193407971 is a prime.

It is a super-2 number, since 2×2193407987² = 9622077194870784338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2193407287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096703993 + 1096703994.

It is an arithmetic number, because the mean of its divisors is an integer number (1096703994).

Almost surely, 2^2193407987 is an apocalyptic number.

2193407987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193407987 is an equidigital number, since it uses as much as digits as its factorization.

2193407987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 2193407987 is about 46833.8337849892. The cubic root of 2193407987 is about 1299.2911297076.

The spelling of 2193407987 in words is "two billion, one hundred ninety-three million, four hundred seven thousand, nine hundred eighty-seven".