7981469387 has 4 divisors (see below), whose sum is σ = 7981653576. Its totient is φ = 7981285200.

The previous prime is 7981469371. The next prime is 7981469401. The reversal of 7981469387 is 7839641897.

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

It is a cyclic number.

It is not a de Polignac number, because 7981469387 - 2⁴ = 7981469371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7981469317) 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, 12512 + ... + 126962.

It is an arithmetic number, because the mean of its divisors is an integer number (1995413394).

Almost surely, 2^7981469387 is an apocalyptic number.

7981469387 is a deficient number, since it is larger than the sum of its proper divisors (184189).

7981469387 is a wasteful number, since it uses less digits than its factorization.

7981469387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184188.

The product of its digits is 18289152, while the sum is 62.

The square root of 7981469387 is about 89339.0697679352. The cubic root of 7981469387 is about 1998.4545884091.

The spelling of 7981469387 in words is "seven billion, nine hundred eighty-one million, four hundred sixty-nine thousand, three hundred eighty-seven".