854729391 has 4 divisors (see below), whose sum is σ = 1139639192. Its totient is φ = 569819592.

The previous prime is 854729387. The next prime is 854729399. The reversal of 854729391 is 193927458.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 854729391 - 2² = 854729387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 854729391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854729399) 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, 142454896 + ... + 142454901.

It is an arithmetic number, because the mean of its divisors is an integer number (284909798).

Almost surely, 2^854729391 is an apocalyptic number.

854729391 is a deficient number, since it is larger than the sum of its proper divisors (284909801).

854729391 is a wasteful number, since it uses less digits than its factorization.

854729391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284909800.

The product of its digits is 544320, while the sum is 48.

The square root of 854729391 is about 29235.7553519659. The cubic root of 854729391 is about 949.0218523114.

The spelling of 854729391 in words is "eight hundred fifty-four million, seven hundred twenty-nine thousand, three hundred ninety-one".