2172007 has 2 divisors, whose sum is σ = 2172008. Its totient is φ = 2172006.

The previous prime is 2171999. The next prime is 2172031. The reversal of 2172007 is 7002712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172007 - 2³ = 2171999 is a prime.

It is a super-2 number, since 2×2172007² = 9435228816098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086003 + 1086004.

It is an arithmetic number, because the mean of its divisors is an integer number (1086004).

2^2172007 is an apocalyptic number.

2172007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172007 is an equidigital number, since it uses as much as digits as its factorization.

2172007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 2172007 is about 1473.7730490140. The cubic root of 2172007 is about 129.5051602223.

Adding to 2172007 its reverse (7002712), we get a palindrome (9174719).

The spelling of 2172007 in words is "two million, one hundred seventy-two thousand, seven".