1478381623 has 4 divisors (see below), whose sum is σ = 1479540600. Its totient is φ = 1477222648.

The previous prime is 1478381617. The next prime is 1478381627. The reversal of 1478381623 is 3261838741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3261838741 = 7 ⋅465976963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478381623 is a prime.

It is a super-2 number, since 2×1478381623² = 4371224446448228258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1478381623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478381627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577573 + ... + 580126.

It is an arithmetic number, because the mean of its divisors is an integer number (369885150).

Almost surely, 2^1478381623 is an apocalyptic number.

1478381623 is a deficient number, since it is larger than the sum of its proper divisors (1158977).

1478381623 is a wasteful number, since it uses less digits than its factorization.

1478381623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158976.

The product of its digits is 193536, while the sum is 43.

The square root of 1478381623 is about 38449.7285165968. The cubic root of 1478381623 is about 1139.1883067307.

The spelling of 1478381623 in words is "one billion, four hundred seventy-eight million, three hundred eighty-one thousand, six hundred twenty-three".