1622997 has 12 divisors (see below), whose sum is σ = 2431520. Its totient is φ = 1081836.

The previous prime is 1622987. The next prime is 1623023. The reversal of 1622997 is 7992261.

It is not a de Polignac number, because 1622997 - 2⁴ = 1622981 is a prime.

It is a Duffinian number.

1622997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3097 + ... + 3582.

2^1622997 is an apocalyptic number.

It is an amenable number.

1622997 is a deficient number, since it is larger than the sum of its proper divisors (808523).

1622997 is an frugal number, since it uses more digits than its factorization.

1622997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694 (or 6682 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 1622997 is about 1273.9689949131. The cubic root of 1622997 is about 117.5184096702.

The spelling of 1622997 in words is "one million, six hundred twenty-two thousand, nine hundred ninety-seven".