147722391 has 6 divisors (see below), whose sum is σ = 213376800. Its totient is φ = 98481588.

The previous prime is 147722383. The next prime is 147722423. The reversal of 147722391 is 193227741.

It is not a de Polignac number, because 147722391 - 2³ = 147722383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147721391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8206791 + ... + 8206808.

It is an arithmetic number, because the mean of its divisors is an integer number (35562800).

Almost surely, 2^147722391 is an apocalyptic number.

147722391 is a deficient number, since it is larger than the sum of its proper divisors (65654409).

147722391 is a wasteful number, since it uses less digits than its factorization.

147722391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16413605 (or 16413602 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 147722391 is about 12154.1100455772. The cubic root of 147722391 is about 528.6263121312.

The spelling of 147722391 in words is "one hundred forty-seven million, seven hundred twenty-two thousand, three hundred ninety-one".