69147945 has 16 divisors (see below), whose sum is σ = 122929920. Its totient is φ = 36878832.

The previous prime is 69147929. The next prime is 69147979. The reversal of 69147945 is 54974196.

It is not a de Polignac number, because 69147945 - 2⁴ = 69147929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 69147945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255969 + ... + 256238.

It is an arithmetic number, because the mean of its divisors is an integer number (7683120).

Almost surely, 2^69147945 is an apocalyptic number.

It is an amenable number.

69147945 is a deficient number, since it is larger than the sum of its proper divisors (53781975).

69147945 is a wasteful number, since it uses less digits than its factorization.

69147945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512221 (or 512215 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 69147945 is about 8315.5243370457. The cubic root of 69147945 is about 410.4495267851.

The spelling of 69147945 in words is "sixty-nine million, one hundred forty-seven thousand, nine hundred forty-five".