69238991 has 4 divisors (see below), whose sum is σ = 69265392. Its totient is φ = 69212592.

The previous prime is 69238937. The next prime is 69239029. The reversal of 69238991 is 19983296.

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

It is a cyclic number.

It is not a de Polignac number, because 69238991 - 2⁶ = 69238927 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 (69238931) 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, 8771 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (17316348).

Almost surely, 2^69238991 is an apocalyptic number.

69238991 is a deficient number, since it is larger than the sum of its proper divisors (26401).

69238991 is a wasteful number, since it uses less digits than its factorization.

69238991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26400.

The product of its digits is 209952, while the sum is 47.

The square root of 69238991 is about 8320.9969955529. The cubic root of 69238991 is about 410.6295919011.

The spelling of 69238991 in words is "sixty-nine million, two hundred thirty-eight thousand, nine hundred ninety-one".