9782623421 has 2 divisors, whose sum is σ = 9782623422. Its totient is φ = 9782623420.

The previous prime is 9782623393. The next prime is 9782623441. The reversal of 9782623421 is 1243262879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6969912196 + 2812711225 = 83486^2 + 53035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9782623421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9782623441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4891311710 + 4891311711.

It is an arithmetic number, because the mean of its divisors is an integer number (4891311711).

Almost surely, 2^9782623421 is an apocalyptic number.

It is an amenable number.

9782623421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9782623421 is an equidigital number, since it uses as much as digits as its factorization.

9782623421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 9782623421 is about 98907.1454496590. The cubic root of 9782623421 is about 2138.7094018195.

The spelling of 9782623421 in words is "nine billion, seven hundred eighty-two million, six hundred twenty-three thousand, four hundred twenty-one".