69857473 has 4 divisors (see below), whose sum is σ = 79837120. Its totient is φ = 59877828.

The previous prime is 69857441. The next prime is 69857479. The reversal of 69857473 is 37475896.

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 69857473 - 2⁵ = 69857441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69857479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4989813 + ... + 4989826.

It is an arithmetic number, because the mean of its divisors is an integer number (19959280).

Almost surely, 2^69857473 is an apocalyptic number.

It is an amenable number.

69857473 is a deficient number, since it is larger than the sum of its proper divisors (9979647).

69857473 is an equidigital number, since it uses as much as digits as its factorization.

69857473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979646.

The product of its digits is 1270080, while the sum is 49.

The square root of 69857473 is about 8358.0783078409. The cubic root of 69857473 is about 411.8486282922.

The spelling of 69857473 in words is "sixty-nine million, eight hundred fifty-seven thousand, four hundred seventy-three".