69878401 has 4 divisors (see below), whose sum is σ = 69914032. Its totient is φ = 69842772.

The previous prime is 69878363. The next prime is 69878437. The reversal of 69878401 is 10487896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69878401 - 2¹¹ = 69876353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69878491) 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, 14691 + ... + 18856.

It is an arithmetic number, because the mean of its divisors is an integer number (17478508).

Almost surely, 2^69878401 is an apocalyptic number.

It is an amenable number.

69878401 is a deficient number, since it is larger than the sum of its proper divisors (35631).

69878401 is a wasteful number, since it uses less digits than its factorization.

69878401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35630.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 69878401 is about 8359.3301765153. The cubic root of 69878401 is about 411.8897515830.

The spelling of 69878401 in words is "sixty-nine million, eight hundred seventy-eight thousand, four hundred one".