7918742387 has 2 divisors, whose sum is σ = 7918742388. Its totient is φ = 7918742386.

The previous prime is 7918742371. The next prime is 7918742399. The reversal of 7918742387 is 7832478197.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7918742387 - 2⁴ = 7918742371 is a prime.

It is not a weakly prime, because it can be changed into another prime (7918742327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959371193 + 3959371194.

It is an arithmetic number, because the mean of its divisors is an integer number (3959371194).

Almost surely, 2^7918742387 is an apocalyptic number.

7918742387 is a deficient number, since it is larger than the sum of its proper divisors (1).

7918742387 is an equidigital number, since it uses as much as digits as its factorization.

7918742387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 7918742387 is about 88987.3158770395. The cubic root of 7918742387 is about 1993.2054756086.

The spelling of 7918742387 in words is "seven billion, nine hundred eighteen million, seven hundred forty-two thousand, three hundred eighty-seven".