1623901 has 2 divisors, whose sum is σ = 1623902. Its totient is φ = 1623900.

The previous prime is 1623883. The next prime is 1623907. The reversal of 1623901 is 1093261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 301401 = 1150^2 + 549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623901 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811950 + 811951.

It is an arithmetic number, because the mean of its divisors is an integer number (811951).

2^1623901 is an apocalyptic number.

It is an amenable number.

1623901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623901 is an equidigital number, since it uses as much as digits as its factorization.

1623901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1623901 is about 1274.3237422257. The cubic root of 1623901 is about 117.5402246466.

The spelling of 1623901 in words is "one million, six hundred twenty-three thousand, nine hundred one".