891142693 has 8 divisors (see below), whose sum is σ = 1072051520. Its totient is φ = 723634560.

The previous prime is 891142691. The next prime is 891142723. The reversal of 891142693 is 396241198.

It is a happy number.

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 891142693 - 2¹ = 891142691 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 (891142691) 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, 3350028 + ... + 3350293.

It is an arithmetic number, because the mean of its divisors is an integer number (134006440).

Almost surely, 2^891142693 is an apocalyptic number.

It is an amenable number.

891142693 is a deficient number, since it is larger than the sum of its proper divisors (180908827).

891142693 is a wasteful number, since it uses less digits than its factorization.

891142693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700347.

The product of its digits is 93312, while the sum is 43.

The square root of 891142693 is about 29852.0132151920. The cubic root of 891142693 is about 962.3116646851.

The spelling of 891142693 in words is "eight hundred ninety-one million, one hundred forty-two thousand, six hundred ninety-three".