891434532739 has 4 divisors (see below), whose sum is σ = 920190485440. Its totient is φ = 862678580040.

The previous prime is 891434532683. The next prime is 891434532761. The reversal of 891434532739 is 937235434198.

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 891434532739 - 2³³ = 882844598147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891434032739) 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, 14377976304 + ... + 14377976365.

It is an arithmetic number, because the mean of its divisors is an integer number (230047621360).

Almost surely, 2^891434532739 is an apocalyptic number.

891434532739 is a deficient number, since it is larger than the sum of its proper divisors (28755952701).

891434532739 is a wasteful number, since it uses less digits than its factorization.

891434532739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755952700.

The product of its digits is 19595520, while the sum is 58.

The spelling of 891434532739 in words is "eight hundred ninety-one billion, four hundred thirty-four million, five hundred thirty-two thousand, seven hundred thirty-nine".