147190621 has 4 divisors (see below), whose sum is σ = 149603644. Its totient is φ = 144777600.

The previous prime is 147190619. The next prime is 147190643. The reversal of 147190621 is 126091741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126091741 = 47 ⋅2682803.

It can be written as a sum of positive squares in 2 ways, for example, as 36120100 + 111070521 = 6010^2 + 10539^2 .

It is a cyclic number.

It is not a de Polignac number, because 147190621 - 2¹ = 147190619 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 (147190651) 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, 1206420 + ... + 1206541.

It is an arithmetic number, because the mean of its divisors is an integer number (37400911).

Almost surely, 2^147190621 is an apocalyptic number.

It is an amenable number.

147190621 is a deficient number, since it is larger than the sum of its proper divisors (2413023).

147190621 is an equidigital number, since it uses as much as digits as its factorization.

147190621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413022.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 147190621 is about 12132.2141837341. The cubic root of 147190621 is about 527.9912344064.

The spelling of 147190621 in words is "one hundred forty-seven million, one hundred ninety thousand, six hundred twenty-one".