69708421 has 6 divisors (see below), whose sum is σ = 70917522. Its totient is φ = 68501520.

The previous prime is 69708383. The next prime is 69708433. The reversal of 69708421 is 12480796.

It can be written as a sum of positive squares in 3 ways, for example, as 236196 + 69472225 = 486^2 + 8335^2 .

It is not a de Polignac number, because 69708421 - 2⁷ = 69708293 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 (69708451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64675 + ... + 65743.

It is an arithmetic number, because the mean of its divisors is an integer number (11819587).

Almost surely, 2^69708421 is an apocalyptic number.

69708421 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

69708421 is a deficient number, since it is larger than the sum of its proper divisors (1209101).

69708421 is an frugal number, since it uses more digits than its factorization.

69708421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 69708421 is about 8349.1569035442. The cubic root of 69708421 is about 411.5555049252. Note that the first 4 decimals are identical.

The spelling of 69708421 in words is "sixty-nine million, seven hundred eight thousand, four hundred twenty-one".