69978231 has 12 divisors (see below), whose sum is σ = 101221120. Its totient is φ = 46586880.

The previous prime is 69978203. The next prime is 69978269. The reversal of 69978231 is 13287996.

It is not a de Polignac number, because 69978231 - 2¹⁰ = 69977207 is a prime.

It is a super-2 number, since 2×69978231² = 9793905627778722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69978281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1866 + ... + 11976.

Almost surely, 2^69978231 is an apocalyptic number.

69978231 is a deficient number, since it is larger than the sum of its proper divisors (31242889).

69978231 is a wasteful number, since it uses less digits than its factorization.

69978231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886 (or 10883 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 69978231 is about 8365.2992176012. The cubic root of 69978231 is about 412.0858035230.

The spelling of 69978231 in words is "sixty-nine million, nine hundred seventy-eight thousand, two hundred thirty-one".