147971697 has 4 divisors (see below), whose sum is σ = 197295600. Its totient is φ = 98647796.

The previous prime is 147971693. The next prime is 147971699. The reversal of 147971697 is 796179741.

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 147971697 - 2² = 147971693 is a prime.

It is a super-2 number, since 2×147971697² = 43791246226119618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (147971693) 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, 24661947 + ... + 24661952.

It is an arithmetic number, because the mean of its divisors is an integer number (49323900).

Almost surely, 2^147971697 is an apocalyptic number.

It is an amenable number.

147971697 is a deficient number, since it is larger than the sum of its proper divisors (49323903).

147971697 is an equidigital number, since it uses as much as digits as its factorization.

147971697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49323902.

The product of its digits is 666792, while the sum is 51.

The square root of 147971697 is about 12164.3617588429. The cubic root of 147971697 is about 528.9235264780.

The spelling of 147971697 in words is "one hundred forty-seven million, nine hundred seventy-one thousand, six hundred ninety-seven".