1622043901 has 2 divisors, whose sum is σ = 1622043902. Its totient is φ = 1622043900.

The previous prime is 1622043877. The next prime is 1622043961. The reversal of 1622043901 is 1093402261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1532722500 + 89321401 = 39150^2 + 9451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1622043901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1622043901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622043961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811021950 + 811021951.

It is an arithmetic number, because the mean of its divisors is an integer number (811021951).

Almost surely, 2^1622043901 is an apocalyptic number.

It is an amenable number.

1622043901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622043901 is an equidigital number, since it uses as much as digits as its factorization.

1622043901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1622043901 is about 40274.6061557404. The cubic root of 1622043901 is about 1174.9540108151.

The spelling of 1622043901 in words is "one billion, six hundred twenty-two million, forty-three thousand, nine hundred one".