167017421 has 4 divisors (see below), whose sum is σ = 174279072. Its totient is φ = 159755772.

The previous prime is 167017397. The next prime is 167017423. The reversal of 167017421 is 124710761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167017421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167017423) 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, 3630791 + ... + 3630836.

It is an arithmetic number, because the mean of its divisors is an integer number (43569768).

Almost surely, 2^167017421 is an apocalyptic number.

It is an amenable number.

167017421 is a deficient number, since it is larger than the sum of its proper divisors (7261651).

167017421 is an equidigital number, since it uses as much as digits as its factorization.

167017421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261650.

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

The square root of 167017421 is about 12923.5220044692. The cubic root of 167017421 is about 550.7069927413.

It can be divided in two parts, 1670 and 17421, that added together give a palindrome (19091).

The spelling of 167017421 in words is "one hundred sixty-seven million, seventeen thousand, four hundred twenty-one".