1492778323 has 4 divisors (see below), whose sum is σ = 1510763688. Its totient is φ = 1474792960.

The previous prime is 1492778317. The next prime is 1492778351. The reversal of 1492778323 is 3238772941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1492778323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1492778303) 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, 8992558 + ... + 8992723.

It is an arithmetic number, because the mean of its divisors is an integer number (377690922).

Almost surely, 2^1492778323 is an apocalyptic number.

1492778323 is a deficient number, since it is larger than the sum of its proper divisors (17985365).

1492778323 is an equidigital number, since it uses as much as digits as its factorization.

1492778323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17985364.

The product of its digits is 508032, while the sum is 46.

The square root of 1492778323 is about 38636.4895273885. The cubic root of 1492778323 is about 1142.8742294983.

The spelling of 1492778323 in words is "one billion, four hundred ninety-two million, seven hundred seventy-eight thousand, three hundred twenty-three".