69427921 has 8 divisors (see below), whose sum is σ = 70367400. Its totient is φ = 68492160.

The previous prime is 69427909. The next prime is 69427931. The reversal of 69427921 is 12972496.

It can be written as a sum of positive squares in 4 ways, for example, as 7096896 + 62331025 = 2664^2 + 7895^2 .

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 69427921 - 2⁷ = 69427793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69427931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73311 + ... + 74251.

It is an arithmetic number, because the mean of its divisors is an integer number (8795925).

Almost surely, 2^69427921 is an apocalyptic number.

It is an amenable number.

69427921 is a deficient number, since it is larger than the sum of its proper divisors (939479).

69427921 is an equidigital number, since it uses as much as digits as its factorization.

69427921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859.

The product of its digits is 54432, while the sum is 40.

The square root of 69427921 is about 8332.3418676864. The cubic root of 69427921 is about 411.0027428812.

The spelling of 69427921 in words is "sixty-nine million, four hundred twenty-seven thousand, nine hundred twenty-one".