1620079 has 4 divisors (see below), whose sum is σ = 1630960. Its totient is φ = 1609200.

The previous prime is 1620071. The next prime is 1620103. The reversal of 1620079 is 9700261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9700261 = 421 ⋅23041.

It is a cyclic number.

It is not a de Polignac number, because 1620079 - 2³ = 1620071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620071) 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, 5214 + ... + 5515.

It is an arithmetic number, because the mean of its divisors is an integer number (407740).

2^1620079 is an apocalyptic number.

1620079 is a deficient number, since it is larger than the sum of its proper divisors (10881).

1620079 is a wasteful number, since it uses less digits than its factorization.

1620079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1620079 is about 1272.8232398884. The cubic root of 1620079 is about 117.4479383062.

The spelling of 1620079 in words is "one million, six hundred twenty thousand, seventy-nine".