1621952343 has 24 divisors (see below), whose sum is σ = 2650467456. Its totient is φ = 982999800.

The previous prime is 1621952317. The next prime is 1621952357. The reversal of 1621952343 is 3432591261.

1621952343 is a `hidden beast` number, since 1 + 621 + 9 + 5 + 23 + 4 + 3 = 666.

It is not a de Polignac number, because 1621952343 - 2⁶ = 1621952279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1621952298 and 1621952307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621952383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300723 + ... + 306068.

It is an arithmetic number, because the mean of its divisors is an integer number (110436144).

Almost surely, 2^1621952343 is an apocalyptic number.

1621952343 is a deficient number, since it is larger than the sum of its proper divisors (1028515113).

1621952343 is an equidigital number, since it uses as much as digits as its factorization.

1621952343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606817 (or 606805 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1621952343 is about 40273.4694681250. The cubic root of 1621952343 is about 1174.9319032212.

The spelling of 1621952343 in words is "one billion, six hundred twenty-one million, nine hundred fifty-two thousand, three hundred forty-three".