69242491 has 4 divisors (see below), whose sum is σ = 69547752. Its totient is φ = 68937232.

The previous prime is 69242461. The next prime is 69242507. The reversal of 69242491 is 19424296.

It is a happy number.

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 69242491 - 2⁹ = 69241979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69242491.

It is not an unprimeable number, because it can be changed into a prime (69242431) 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, 152290 + ... + 152743.

It is an arithmetic number, because the mean of its divisors is an integer number (17386938).

Almost surely, 2^69242491 is an apocalyptic number.

69242491 is a deficient number, since it is larger than the sum of its proper divisors (305261).

69242491 is a wasteful number, since it uses less digits than its factorization.

69242491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305260.

The product of its digits is 31104, while the sum is 37.

The square root of 69242491 is about 8321.2073042318. The cubic root of 69242491 is about 410.6365108318.

The spelling of 69242491 in words is "sixty-nine million, two hundred forty-two thousand, four hundred ninety-one".