172400611 has 8 divisors (see below), whose sum is σ = 173862144. Its totient is φ = 170945280.

The previous prime is 172400609. The next prime is 172400651. The reversal of 172400611 is 116004271.

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

It is a cyclic number.

It is not a de Polignac number, because 172400611 - 2¹ = 172400609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172400651) 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, 66145 + ... + 68701.

It is an arithmetic number, because the mean of its divisors is an integer number (21732768).

Almost surely, 2^172400611 is an apocalyptic number.

172400611 is a deficient number, since it is larger than the sum of its proper divisors (1461533).

172400611 is a wasteful number, since it uses less digits than its factorization.

172400611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 172400611 is about 13130.1413168328. The cubic root of 172400611 is about 556.5612087430.

Adding to 172400611 its reverse (116004271), we get a palindrome (288404882).

The spelling of 172400611 in words is "one hundred seventy-two million, four hundred thousand, six hundred eleven".