69145813 has 6 divisors (see below), whose sum is σ = 76003382. Its totient is φ = 62859720.

The previous prime is 69145799. The next prime is 69145823. The reversal of 69145813 is 31854196.

It can be written as a sum of positive squares in only one way, i.e., 58110129 + 11035684 = 7623^2 + 3322^2 .

It is not a de Polignac number, because 69145813 - 2⁵ = 69145781 is a prime.

It is a super-2 number, since 2×69145813² = 9562286910861938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69145823) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 285606 + ... + 285847.

Almost surely, 2^69145813 is an apocalyptic number.

It is an amenable number.

69145813 is a deficient number, since it is larger than the sum of its proper divisors (6857569).

69145813 is a wasteful number, since it uses less digits than its factorization.

69145813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571475 (or 571464 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 69145813 is about 8315.3961420969. The cubic root of 69145813 is about 410.4453083547.

The spelling of 69145813 in words is "sixty-nine million, one hundred forty-five thousand, eight hundred thirteen".