8420187479 has 16 divisors (see below), whose sum is σ = 9283921920. Its totient is φ = 7572977760.

The previous prime is 8420187467. The next prime is 8420187491. The reversal of 8420187479 is 9747810248.

It is an interprime number because it is at equal distance from previous prime (8420187467) and next prime (8420187491).

It is a cyclic number.

It is not a de Polignac number, because 8420187479 - 2⁴ = 8420187463 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 (8420187379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389434 + ... + 1395480.

It is an arithmetic number, because the mean of its divisors is an integer number (580245120).

Almost surely, 2^8420187479 is an apocalyptic number.

8420187479 is a deficient number, since it is larger than the sum of its proper divisors (863734441).

8420187479 is a wasteful number, since it uses less digits than its factorization.

8420187479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7390.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 8420187479 is about 91761.5795363179. The cubic root of 8420187479 is about 2034.4198616346.

The spelling of 8420187479 in words is "eight billion, four hundred twenty million, one hundred eighty-seven thousand, four hundred seventy-nine".