69389145 has 36 divisors (see below), whose sum is σ = 139915620. Its totient is φ = 31719744.

The previous prime is 69389107. The next prime is 69389149. The reversal of 69389145 is 54198396.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 40487769 = 5376^2 + 6363^2 .

It is not a de Polignac number, because 69389145 - 2⁷ = 69389017 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 69389145.

It is not an unprimeable number, because it can be changed into a prime (69389149) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13530 + ... + 17939.

It is an arithmetic number, because the mean of its divisors is an integer number (3886545).

Almost surely, 2^69389145 is an apocalyptic number.

It is an amenable number.

69389145 is an abundant number, since it is smaller than the sum of its proper divisors (70526475).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69389145 is a wasteful number, since it uses less digits than its factorization.

69389145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31494 (or 31484 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 69389145 is about 8330.0147058694. The cubic root of 69389145 is about 410.9262126225.

The spelling of 69389145 in words is "sixty-nine million, three hundred eighty-nine thousand, one hundred forty-five".