147072621 has 4 divisors (see below), whose sum is σ = 196096832. Its totient is φ = 98048412.

The previous prime is 147072613. The next prime is 147072623. The reversal of 147072621 is 126270741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 126270741 = 3 ⋅42090247.

It is not a de Polignac number, because 147072621 - 2³ = 147072613 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 (147072623) 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, 24512101 + ... + 24512106.

It is an arithmetic number, because the mean of its divisors is an integer number (49024208).

Almost surely, 2^147072621 is an apocalyptic number.

It is an amenable number.

147072621 is a deficient number, since it is larger than the sum of its proper divisors (49024211).

147072621 is an equidigital number, since it uses as much as digits as its factorization.

147072621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49024210.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 147072621 is about 12127.3501227597. The cubic root of 147072621 is about 527.8501030814.

The spelling of 147072621 in words is "one hundred forty-seven million, seventy-two thousand, six hundred twenty-one".