891629053 has 4 divisors (see below), whose sum is σ = 1019004640. Its totient is φ = 764253468.

The previous prime is 891629033. The next prime is 891629083. The reversal of 891629053 is 350926198.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 891629053 - 2²⁵ = 858074621 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 (891629023) 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, 63687783 + ... + 63687796.

It is an arithmetic number, because the mean of its divisors is an integer number (254751160).

Almost surely, 2^891629053 is an apocalyptic number.

It is an amenable number.

891629053 is a deficient number, since it is larger than the sum of its proper divisors (127375587).

891629053 is a wasteful number, since it uses less digits than its factorization.

891629053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127375586.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 891629053 is about 29860.1582882610. The cubic root of 891629053 is about 962.4867001704.

The spelling of 891629053 in words is "eight hundred ninety-one million, six hundred twenty-nine thousand, fifty-three".