69778243 has 4 divisors (see below), whose sum is σ = 70016688. Its totient is φ = 69539800.

The previous prime is 69778237. The next prime is 69778249. The reversal of 69778243 is 34287796.

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

It is an interprime number because it is at equal distance from previous prime (69778237) and next prime (69778249).

It is a cyclic number.

It is not a de Polignac number, because 69778243 - 2⁹ = 69777731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69778193 and 69778202.

It is not an unprimeable number, because it can be changed into a prime (69778249) 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, 118783 + ... + 119368.

It is an arithmetic number, because the mean of its divisors is an integer number (17504172).

Almost surely, 2^69778243 is an apocalyptic number.

69778243 is a deficient number, since it is larger than the sum of its proper divisors (238445).

69778243 is a wasteful number, since it uses less digits than its factorization.

69778243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238444.

The product of its digits is 508032, while the sum is 46.

The square root of 69778243 is about 8353.3372372962. The cubic root of 69778243 is about 411.6928677633.

The spelling of 69778243 in words is "sixty-nine million, seven hundred seventy-eight thousand, two hundred forty-three".