69906745 has 4 divisors (see below), whose sum is σ = 83888100. Its totient is φ = 55925392.

The previous prime is 69906743. The next prime is 69906751. The reversal of 69906745 is 54760996.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30769209 + 39137536 = 5547^2 + 6256^2 .

It is a cyclic number.

It is not a de Polignac number, because 69906745 - 2¹ = 69906743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69906695 and 69906704.

It is not an unprimeable number, because it can be changed into a prime (69906743) 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, 6990670 + ... + 6990679.

It is an arithmetic number, because the mean of its divisors is an integer number (20972025).

Almost surely, 2^69906745 is an apocalyptic number.

It is an amenable number.

69906745 is a deficient number, since it is larger than the sum of its proper divisors (13981355).

69906745 is a wasteful number, since it uses less digits than its factorization.

69906745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13981354.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 69906745 is about 8361.0253557802. The cubic root of 69906745 is about 411.9454341441.

The spelling of 69906745 in words is "sixty-nine million, nine hundred six thousand, seven hundred forty-five".