1478666923 has 4 divisors (see below), whose sum is σ = 1526365888. Its totient is φ = 1430967960.

The previous prime is 1478666897. The next prime is 1478666971. The reversal of 1478666923 is 3296668741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3296668741 = 53 ⋅62201297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1478666923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1478666023) 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, 23849436 + ... + 23849497.

It is an arithmetic number, because the mean of its divisors is an integer number (381591472).

Almost surely, 2^1478666923 is an apocalyptic number.

1478666923 is a deficient number, since it is larger than the sum of its proper divisors (47698965).

1478666923 is an equidigital number, since it uses as much as digits as its factorization.

1478666923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47698964.

The product of its digits is 2612736, while the sum is 52.

The square root of 1478666923 is about 38453.4383768214. The cubic root of 1478666923 is about 1139.2615826955.

The spelling of 1478666923 in words is "one billion, four hundred seventy-eight million, six hundred sixty-six thousand, nine hundred twenty-three".