1656949 has 4 divisors (see below), whose sum is σ = 1893664. Its totient is φ = 1420236.

The previous prime is 1656947. The next prime is 1656953. The reversal of 1656949 is 9496561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9496561 = 19 ⋅499819.

It is a cyclic number.

It is not a de Polignac number, because 1656949 - 2¹ = 1656947 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1656949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656947) 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, 118347 + ... + 118360.

It is an arithmetic number, because the mean of its divisors is an integer number (473416).

2^1656949 is an apocalyptic number.

It is an amenable number.

1656949 is a deficient number, since it is larger than the sum of its proper divisors (236715).

1656949 is an equidigital number, since it uses as much as digits as its factorization.

1656949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236714.

The product of its digits is 58320, while the sum is 40.

The square root of 1656949 is about 1287.2253105032. The cubic root of 1656949 is about 118.3322294856.

It can be divided in two parts, 16 and 56949, that added together give a palindrome (56965).

The spelling of 1656949 in words is "one million, six hundred fifty-six thousand, nine hundred forty-nine".