30087978197 has 4 divisors (see below), whose sum is σ = 30088883916. Its totient is φ = 30087072480.

The previous prime is 30087978169. The next prime is 30087978227. The reversal of 30087978197 is 79187978003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1834066276 + 28253911921 = 42826^2 + 168089^2 .

It is a cyclic number.

It is not a de Polignac number, because 30087978197 - 2⁶ = 30087978133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30087978097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401054 + ... + 470127.

It is an arithmetic number, because the mean of its divisors is an integer number (7522220979).

Almost surely, 2^30087978197 is an apocalyptic number.

It is an amenable number.

30087978197 is a deficient number, since it is larger than the sum of its proper divisors (905719).

30087978197 is an equidigital number, since it uses as much as digits as its factorization.

30087978197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905718.

The product of its (nonzero) digits is 5334336, while the sum is 59.

The spelling of 30087978197 in words is "thirty billion, eighty-seven million, nine hundred seventy-eight thousand, one hundred ninety-seven".