69498721 has 8 divisors (see below), whose sum is σ = 70154280. Its totient is φ = 68846592.

The previous prime is 69498673. The next prime is 69498743. The reversal of 69498721 is 12789496.

It can be written as a sum of positive squares in 4 ways, for example, as 40500496 + 28998225 = 6364^2 + 5385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69498721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69498791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55935 + ... + 57163.

It is an arithmetic number, because the mean of its divisors is an integer number (8769285).

Almost surely, 2^69498721 is an apocalyptic number.

It is an amenable number.

69498721 is a deficient number, since it is larger than the sum of its proper divisors (655559).

69498721 is a wasteful number, since it uses less digits than its factorization.

69498721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715.

The product of its digits is 217728, while the sum is 46.

The square root of 69498721 is about 8336.5892905912. The cubic root of 69498721 is about 411.1424038323.

The spelling of 69498721 in words is "sixty-nine million, four hundred ninety-eight thousand, seven hundred twenty-one".