1020402623 has 4 divisors (see below), whose sum is σ = 1028192088. Its totient is φ = 1012613160.

The previous prime is 1020402601. The next prime is 1020402641. The reversal of 1020402623 is 3262040201.

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 1020402623 - 2⁸ = 1020402367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020402595 and 1020402604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020402653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3894536 + ... + 3894797.

It is an arithmetic number, because the mean of its divisors is an integer number (257048022).

Almost surely, 2^1020402623 is an apocalyptic number.

1020402623 is a deficient number, since it is larger than the sum of its proper divisors (7789465).

1020402623 is an equidigital number, since it uses as much as digits as its factorization.

1020402623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7789464.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1020402623 is about 31943.7415310104. The cubic root of 1020402623 is about 1006.7551396714.

Adding to 1020402623 its reverse (3262040201), we get a palindrome (4282442824).

The spelling of 1020402623 in words is "one billion, twenty million, four hundred two thousand, six hundred twenty-three".