964491139 has 4 divisors (see below), whose sum is σ = 965409880. Its totient is φ = 963572400.

The previous prime is 964491137. The next prime is 964491149. The reversal of 964491139 is 931194469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931194469 = 103 ⋅9040723.

It is a cyclic number.

It is not a de Polignac number, because 964491139 - 2¹ = 964491137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (964491133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457794 + ... + 459895.

It is an arithmetic number, because the mean of its divisors is an integer number (241352470).

Almost surely, 2^964491139 is an apocalyptic number.

964491139 is a deficient number, since it is larger than the sum of its proper divisors (918741).

964491139 is a wasteful number, since it uses less digits than its factorization.

964491139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918740.

The product of its digits is 209952, while the sum is 46.

The square root of 964491139 is about 31056.2576464068. The cubic root of 964491139 is about 988.0207844060.

The spelling of 964491139 in words is "nine hundred sixty-four million, four hundred ninety-one thousand, one hundred thirty-nine".