147606821 has 4 divisors (see below), whose sum is σ = 148986432. Its totient is φ = 146227212.

The previous prime is 147606817. The next prime is 147606863. The reversal of 147606821 is 128606741.

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.

It is a cyclic number.

It is not a de Polignac number, because 147606821 - 2² = 147606817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147606871) 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, 689645 + ... + 689858.

It is an arithmetic number, because the mean of its divisors is an integer number (37246608).

Almost surely, 2^147606821 is an apocalyptic number.

It is an amenable number.

147606821 is a deficient number, since it is larger than the sum of its proper divisors (1379611).

147606821 is a wasteful number, since it uses less digits than its factorization.

147606821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379610.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 147606821 is about 12149.3547565293. The cubic root of 147606821 is about 528.4884199641.

The spelling of 147606821 in words is "one hundred forty-seven million, six hundred six thousand, eight hundred twenty-one".