172010387 has 4 divisors (see below), whose sum is σ = 175255920. Its totient is φ = 168764856.

The previous prime is 172010383. The next prime is 172010417. The reversal of 172010387 is 783010271.

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 172010387 - 2² = 172010383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172010383) 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, 1622687 + ... + 1622792.

It is an arithmetic number, because the mean of its divisors is an integer number (43813980).

Almost surely, 2^172010387 is an apocalyptic number.

172010387 is a deficient number, since it is larger than the sum of its proper divisors (3245533).

172010387 is an equidigital number, since it uses as much as digits as its factorization.

172010387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245532.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 172010387 is about 13115.2730432881. The cubic root of 172010387 is about 556.1409712330.

The spelling of 172010387 in words is "one hundred seventy-two million, ten thousand, three hundred eighty-seven".