69481409 has 4 divisors (see below), whose sum is σ = 70659120. Its totient is φ = 68303700.

The previous prime is 69481387. The next prime is 69481417. The reversal of 69481409 is 90418496.

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 69481409 - 2²⁴ = 52704193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69481439) 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, 588767 + ... + 588884.

It is an arithmetic number, because the mean of its divisors is an integer number (17664780).

Almost surely, 2^69481409 is an apocalyptic number.

It is an amenable number.

69481409 is a deficient number, since it is larger than the sum of its proper divisors (1177711).

69481409 is a wasteful number, since it uses less digits than its factorization.

69481409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177710.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 69481409 is about 8335.5509116075. The cubic root of 69481409 is about 411.1082627322.

The spelling of 69481409 in words is "sixty-nine million, four hundred eighty-one thousand, four hundred nine".