1623351647 has 4 divisors (see below), whose sum is σ = 1679329320. Its totient is φ = 1567373976.

The previous prime is 1623351619. The next prime is 1623351649. The reversal of 1623351647 is 7461533261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1623351647 - 2⁸ = 1623351391 is a prime.

It is a super-2 number, since 2×1623351647² = 5270541139635225218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1623351647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623351649) 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, 27988793 + ... + 27988850.

It is an arithmetic number, because the mean of its divisors is an integer number (419832330).

Almost surely, 2^1623351647 is an apocalyptic number.

1623351647 is a deficient number, since it is larger than the sum of its proper divisors (55977673).

1623351647 is an equidigital number, since it uses as much as digits as its factorization.

1623351647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55977672.

The product of its digits is 90720, while the sum is 38.

The square root of 1623351647 is about 40290.8382513941. The cubic root of 1623351647 is about 1175.2696883901.

The spelling of 1623351647 in words is "one billion, six hundred twenty-three million, three hundred fifty-one thousand, six hundred forty-seven".