207442919 has 4 divisors (see below), whose sum is σ = 208303920. Its totient is φ = 206581920.

The previous prime is 207442889. The next prime is 207442987. The reversal of 207442919 is 919244702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919244702 = 2 ⋅459622351.

It is a cyclic number.

It is not a de Polignac number, because 207442919 - 2¹² = 207438823 is a prime.

It is a super-2 number, since 2×207442919² = 86065129286481122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207442219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430139 + ... + 430620.

It is an arithmetic number, because the mean of its divisors is an integer number (52075980).

Almost surely, 2^207442919 is an apocalyptic number.

207442919 is a deficient number, since it is larger than the sum of its proper divisors (861001).

207442919 is an equidigital number, since it uses as much as digits as its factorization.

207442919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861000.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 207442919 is about 14402.8788441756. The cubic root of 207442919 is about 591.9697823251.

The spelling of 207442919 in words is "two hundred seven million, four hundred forty-two thousand, nine hundred nineteen".