147720901 has 4 divisors (see below), whose sum is σ = 148072204. Its totient is φ = 147369600.

The previous prime is 147720887. The next prime is 147720913. The reversal of 147720901 is 109027741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68973025 + 78747876 = 8305^2 + 8874^2 .

It is a cyclic number.

It is not a de Polignac number, because 147720901 - 2¹⁹ = 147196613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147720401) 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, 175020 + ... + 175861.

It is an arithmetic number, because the mean of its divisors is an integer number (37018051).

Almost surely, 2^147720901 is an apocalyptic number.

It is an amenable number.

147720901 is a deficient number, since it is larger than the sum of its proper divisors (351303).

147720901 is an equidigital number, since it uses as much as digits as its factorization.

147720901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351302.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 147720901 is about 12154.0487492852. The cubic root of 147720901 is about 528.6245347977.

The spelling of 147720901 in words is "one hundred forty-seven million, seven hundred twenty thousand, nine hundred one".