1491896939 has 8 divisors (see below), whose sum is σ = 1607261712. Its totient is φ = 1376618400.

The previous prime is 1491896933. The next prime is 1491896953. The reversal of 1491896939 is 9396981941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1491896939 - 2⁸ = 1491896683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491896933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16937 + ... + 57189.

It is an arithmetic number, because the mean of its divisors is an integer number (200907714).

Almost surely, 2^1491896939 is an apocalyptic number.

1491896939 is a deficient number, since it is larger than the sum of its proper divisors (115364773).

1491896939 is a wasteful number, since it uses less digits than its factorization.

1491896939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43117.

The product of its digits is 3779136, while the sum is 59.

The square root of 1491896939 is about 38625.0817345414. The cubic root of 1491896939 is about 1142.6492553993.

The spelling of 1491896939 in words is "one billion, four hundred ninety-one million, eight hundred ninety-six thousand, nine hundred thirty-nine".