2720019 has 4 divisors (see below), whose sum is σ = 3626696. Its totient is φ = 1813344.

The previous prime is 2720009. The next prime is 2720071. The reversal of 2720019 is 9100272.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2720019 - 2⁵ = 2719987 is a prime.

It is a super-2 number, since 2×2720019² = 14797006720722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2719977 and 2720004.

It is not an unprimeable number, because it can be changed into a prime (2720009) 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, 453334 + ... + 453339.

It is an arithmetic number, because the mean of its divisors is an integer number (906674).

2^2720019 is an apocalyptic number.

2720019 is a deficient number, since it is larger than the sum of its proper divisors (906677).

2720019 is an equidigital number, since it uses as much as digits as its factorization.

2720019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906676.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 2720019 is about 1649.2480104581. The cubic root of 2720019 is about 139.5909659646.

The spelling of 2720019 in words is "two million, seven hundred twenty thousand, nineteen".