172040397 has 8 divisors (see below), whose sum is σ = 229525920. Its totient is φ = 114624240.

The previous prime is 172040381. The next prime is 172040399. The reversal of 172040397 is 793040271.

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

It is not a de Polignac number, because 172040397 - 2⁴ = 172040381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172040399) 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, 11247 + ... + 21692.

It is an arithmetic number, because the mean of its divisors is an integer number (28690740).

Almost surely, 2^172040397 is an apocalyptic number.

It is an amenable number.

172040397 is a deficient number, since it is larger than the sum of its proper divisors (57485523).

172040397 is a wasteful number, since it uses less digits than its factorization.

172040397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34683.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 172040397 is about 13116.4170793704. The cubic root of 172040397 is about 556.1733119544.

The spelling of 172040397 in words is "one hundred seventy-two million, forty thousand, three hundred ninety-seven".