1023403421 has 2 divisors, whose sum is σ = 1023403422. Its totient is φ = 1023403420.

The previous prime is 1023403399. The next prime is 1023403429. The reversal of 1023403421 is 1243043201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 950488900 + 72914521 = 30830^2 + 8539^2 .

It is an emirp because it is prime and its reverse (1243043201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023403421 - 2⁶ = 1023403357 is a prime.

It is a super-2 number, since 2×1023403421² = 2094709124229006482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1023403393 and 1023403402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023403429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511701710 + 511701711.

It is an arithmetic number, because the mean of its divisors is an integer number (511701711).

Almost surely, 2^1023403421 is an apocalyptic number.

It is an amenable number.

1023403421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023403421 is an equidigital number, since it uses as much as digits as its factorization.

1023403421 is an evil number, because the sum of its binary digits is even.

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

The square root of 1023403421 is about 31990.6770950538. The cubic root of 1023403421 is about 1007.7410616723.

Adding to 1023403421 its reverse (1243043201), we get a palindrome (2266446622).

The spelling of 1023403421 in words is "one billion, twenty-three million, four hundred three thousand, four hundred twenty-one".