172641943 has 4 divisors (see below), whose sum is σ = 172793088. Its totient is φ = 172490800.

The previous prime is 172641941. The next prime is 172641949. The reversal of 172641943 is 349146271.

172641943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172641943 - 2¹ = 172641941 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 (172641941) 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, 73846 + ... + 76147.

It is an arithmetic number, because the mean of its divisors is an integer number (43198272).

Almost surely, 2^172641943 is an apocalyptic number.

172641943 is a deficient number, since it is larger than the sum of its proper divisors (151145).

172641943 is a wasteful number, since it uses less digits than its factorization.

172641943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151144.

The product of its digits is 36288, while the sum is 37.

The square root of 172641943 is about 13139.3281030652. The cubic root of 172641943 is about 556.8207851722.

The spelling of 172641943 in words is "one hundred seventy-two million, six hundred forty-one thousand, nine hundred forty-three".