147661913 has 4 divisors (see below), whose sum is σ = 168756480. Its totient is φ = 126567348.

The previous prime is 147661883. The next prime is 147661937. The reversal of 147661913 is 319166741.

It is a happy number.

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: 319166741 = 631 ⋅505811.

It is a cyclic number.

It is not a de Polignac number, because 147661913 - 2⁶ = 147661849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147661963) 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, 10547273 + ... + 10547286.

It is an arithmetic number, because the mean of its divisors is an integer number (42189120).

Almost surely, 2^147661913 is an apocalyptic number.

It is an amenable number.

147661913 is a deficient number, since it is larger than the sum of its proper divisors (21094567).

147661913 is an equidigital number, since it uses as much as digits as its factorization.

147661913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21094566.

The product of its digits is 27216, while the sum is 38.

The square root of 147661913 is about 12151.6218259128. The cubic root of 147661913 is about 528.5541618729.

The spelling of 147661913 in words is "one hundred forty-seven million, six hundred sixty-one thousand, nine hundred thirteen".