69790721 has 32 divisors (see below), whose sum is σ = 94687488. Its totient is φ = 49674240.

The previous prime is 69790711. The next prime is 69790753. The reversal of 69790721 is 12709796.

It is a happy number.

It is not a de Polignac number, because 69790721 - 2¹⁰ = 69789697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69790711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112805 + ... + 113421.

It is an arithmetic number, because the mean of its divisors is an integer number (2958984).

Almost surely, 2^69790721 is an apocalyptic number.

It is an amenable number.

69790721 is a deficient number, since it is larger than the sum of its proper divisors (24896767).

69790721 is a wasteful number, since it uses less digits than its factorization.

69790721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 69790721 is about 8354.0840910300. The cubic root of 69790721 is about 411.7174064409.

The spelling of 69790721 in words is "sixty-nine million, seven hundred ninety thousand, seven hundred twenty-one".