69879477 has 4 divisors (see below), whose sum is σ = 93172640. Its totient is φ = 46586316.

The previous prime is 69879449. The next prime is 69879521. The reversal of 69879477 is 77497896.

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 not a de Polignac number, because 69879477 - 2⁷ = 69879349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69879437) 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, 11646577 + ... + 11646582.

It is an arithmetic number, because the mean of its divisors is an integer number (23293160).

Almost surely, 2^69879477 is an apocalyptic number.

It is an amenable number.

69879477 is a deficient number, since it is larger than the sum of its proper divisors (23293163).

69879477 is a wasteful number, since it uses less digits than its factorization.

69879477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23293162.

The product of its digits is 5334336, while the sum is 57.

The square root of 69879477 is about 8359.3945354912. The cubic root of 69879477 is about 411.8918656893.

The spelling of 69879477 in words is "sixty-nine million, eight hundred seventy-nine thousand, four hundred seventy-seven".