7147145639 has 4 divisors (see below), whose sum is σ = 7147976880. Its totient is φ = 7146314400.

The previous prime is 7147145617. The next prime is 7147145641. The reversal of 7147145639 is 9365417417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9365417417 = 53 ⋅176705989.

It is a cyclic number.

It is not a de Polignac number, because 7147145639 - 2¹⁶ = 7147080103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7147145593 and 7147145602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7147145609) 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, 402587 + ... + 419964.

It is an arithmetic number, because the mean of its divisors is an integer number (1786994220).

Almost surely, 2^7147145639 is an apocalyptic number.

7147145639 is a deficient number, since it is larger than the sum of its proper divisors (831241).

7147145639 is an equidigital number, since it uses as much as digits as its factorization.

7147145639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831240.

The product of its digits is 635040, while the sum is 47.

The square root of 7147145639 is about 84540.7927511920. The cubic root of 7147145639 is about 1926.2421298174.

The spelling of 7147145639 in words is "seven billion, one hundred forty-seven million, one hundred forty-five thousand, six hundred thirty-nine".