69721441 has 8 divisors (see below), whose sum is σ = 73123200. Its totient is φ = 66350592.

The previous prime is 69721433. The next prime is 69721451. The reversal of 69721441 is 14412796.

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

It is a cyclic number.

It is not a de Polignac number, because 69721441 - 2³ = 69721433 is a prime.

It is a super-2 number, since 2×69721441² = 9722158670232962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69721397 and 69721406.

It is not an unprimeable number, because it can be changed into a prime (69721451) 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, 3040 + ... + 12193.

It is an arithmetic number, because the mean of its divisors is an integer number (9140400).

Almost surely, 2^69721441 is an apocalyptic number.

It is an amenable number.

69721441 is a deficient number, since it is larger than the sum of its proper divisors (3401759).

69721441 is a wasteful number, since it uses less digits than its factorization.

69721441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15455.

The product of its digits is 12096, while the sum is 34.

The square root of 69721441 is about 8349.9365865856. The cubic root of 69721441 is about 411.5811265025.

The spelling of 69721441 in words is "sixty-nine million, seven hundred twenty-one thousand, four hundred forty-one".