147491979 has 8 divisors (see below), whose sum is σ = 196726992. Its totient is φ = 98292480.

The previous prime is 147491963. The next prime is 147491989. The reversal of 147491979 is 979194741.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 147491979 - 2⁴ = 147491963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (147491909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 17459.

It is an arithmetic number, because the mean of its divisors is an integer number (24590874).

Almost surely, 2^147491979 is an apocalyptic number.

147491979 is a deficient number, since it is larger than the sum of its proper divisors (49235013).

147491979 is a wasteful number, since it uses less digits than its factorization.

147491979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17757.

The product of its digits is 571536, while the sum is 51.

The square root of 147491979 is about 12144.6275776575. The cubic root of 147491979 is about 528.3513250935.

The spelling of 147491979 in words is "one hundred forty-seven million, four hundred ninety-one thousand, nine hundred seventy-nine".