1421436823 has 16 divisors (see below), whose sum is σ = 1511617536. Its totient is φ = 1333743840.

The previous prime is 1421436817. The next prime is 1421436829. The reversal of 1421436823 is 3286341241.

It is an interprime number because it is at equal distance from previous prime (1421436817) and next prime (1421436829).

It is a cyclic number.

It is not a de Polignac number, because 1421436823 - 2²¹ = 1419339671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421436829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620386 + ... + 622672.

It is an arithmetic number, because the mean of its divisors is an integer number (94476096).

Almost surely, 2^1421436823 is an apocalyptic number.

1421436823 is a deficient number, since it is larger than the sum of its proper divisors (90180713).

1421436823 is a wasteful number, since it uses less digits than its factorization.

1421436823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814.

The product of its digits is 27648, while the sum is 34.

The square root of 1421436823 is about 37701.9472043554. The cubic root of 1421436823 is about 1124.3698391516.

It can be divided in two parts, 1421 and 436823, that added together give a square (438244 = 662²).

The spelling of 1421436823 in words is "one billion, four hundred twenty-one million, four hundred thirty-six thousand, eight hundred twenty-three".