79218946087 has 2 divisors, whose sum is σ = 79218946088. Its totient is φ = 79218946086.

The previous prime is 79218946073. The next prime is 79218946091. The reversal of 79218946087 is 78064981297.

It is a strong prime.

It is an emirp because it is prime and its reverse (78064981297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79218946087 - 2¹¹ = 79218944039 is a prime.

It is a super-2 number, since 2×79218946087² (a number of 23 digits) contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79218946687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39609473043 + 39609473044.

It is an arithmetic number, because the mean of its divisors is an integer number (39609473044).

Almost surely, 2^79218946087 is an apocalyptic number.

79218946087 is a deficient number, since it is larger than the sum of its proper divisors (1).

79218946087 is an equidigital number, since it uses as much as digits as its factorization.

79218946087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 79218946087 in words is "seventy-nine billion, two hundred eighteen million, nine hundred forty-six thousand, eighty-seven".