172406497 has 4 divisors (see below), whose sum is σ = 172432836. Its totient is φ = 172380160.

The previous prime is 172406491. The next prime is 172406501. The reversal of 172406497 is 794604271.

172406497 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 122788561 + 49617936 = 11081^2 + 7044^2 .

It is a cyclic number.

It is not a de Polignac number, because 172406497 - 2³ = 172406489 is a prime.

It is a super-2 number, since 2×172406497² = 59448000415622018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172406491) 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, 5073 + ... + 19249.

It is an arithmetic number, because the mean of its divisors is an integer number (43108209).

Almost surely, 2^172406497 is an apocalyptic number.

It is an amenable number.

172406497 is a deficient number, since it is larger than the sum of its proper divisors (26339).

172406497 is a wasteful number, since it uses less digits than its factorization.

172406497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26338.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 172406497 is about 13130.3654556909. The cubic root of 172406497 is about 556.5675425991.

The spelling of 172406497 in words is "one hundred seventy-two million, four hundred six thousand, four hundred ninety-seven".