2621923 has 2 divisors, whose sum is σ = 2621924. Its totient is φ = 2621922.

The previous prime is 2621921. The next prime is 2621929. The reversal of 2621923 is 3291262.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2621923 - 2¹ = 2621921 is a prime.

Together with 2621921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2621921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310961 + 1310962.

It is an arithmetic number, because the mean of its divisors is an integer number (1310962).

2^2621923 is an apocalyptic number.

2621923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621923 is an equidigital number, since it uses as much as digits as its factorization.

2621923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 2621923 is about 1619.2353133501. The cubic root of 2621923 is about 137.8922880010.

The spelling of 2621923 in words is "two million, six hundred twenty-one thousand, nine hundred twenty-three".