1623220497 has 6 divisors (see below), whose sum is σ = 2344651842. Its totient is φ = 1082146992.

The previous prime is 1623220433. The next prime is 1623220507. The reversal of 1623220497 is 7940223261.

1623220497 is a `hidden beast` number, since 1 + 623 + 2 + 20 + 4 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 993762576 + 629457921 = 31524^2 + 25089^2 .

It is not a de Polignac number, because 1623220497 - 2⁶ = 1623220433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1623220427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90178908 + ... + 90178925.

It is an arithmetic number, because the mean of its divisors is an integer number (390775307).

Almost surely, 2^1623220497 is an apocalyptic number.

It is an amenable number.

1623220497 is a deficient number, since it is larger than the sum of its proper divisors (721431345).

1623220497 is a wasteful number, since it uses less digits than its factorization.

1623220497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180357839 (or 180357836 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1623220497 is about 40289.2106773017. The cubic root of 1623220497 is about 1175.2380376649.

The spelling of 1623220497 in words is "one billion, six hundred twenty-three million, two hundred twenty thousand, four hundred ninety-seven".