1492857791 has 4 divisors (see below), whose sum is σ = 1504253784. Its totient is φ = 1481461800.

The previous prime is 1492857781. The next prime is 1492857799. The reversal of 1492857791 is 1977582941.

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

It is a cyclic number.

It is not a de Polignac number, because 1492857791 - 2¹⁰ = 1492856767 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 (1492857799) 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, 5697800 + ... + 5698061.

It is an arithmetic number, because the mean of its divisors is an integer number (376063446).

Almost surely, 2^1492857791 is an apocalyptic number.

1492857791 is a deficient number, since it is larger than the sum of its proper divisors (11395993).

1492857791 is a wasteful number, since it uses less digits than its factorization.

1492857791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395992.

The product of its digits is 1270080, while the sum is 53.

The square root of 1492857791 is about 38637.5179197629. The cubic root of 1492857791 is about 1142.8945094278.

The spelling of 1492857791 in words is "one billion, four hundred ninety-two million, eight hundred fifty-seven thousand, seven hundred ninety-one".