69642979 has 8 divisors (see below), whose sum is σ = 79675488. Its totient is φ = 59631360.

The previous prime is 69642973. The next prime is 69642997. The reversal of 69642979 is 97924696.

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 69642979 - 2³ = 69642971 is a prime.

It is a super-3 number, since 3×69642979³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69642971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2739 + ... + 12115.

It is an arithmetic number, because the mean of its divisors is an integer number (9959436).

Almost surely, 2^69642979 is an apocalyptic number.

69642979 is a deficient number, since it is larger than the sum of its proper divisors (10032509).

69642979 is a wasteful number, since it uses less digits than its factorization.

69642979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10445.

The product of its digits is 1469664, while the sum is 52.

The square root of 69642979 is about 8345.2369049656. The cubic root of 69642979 is about 411.4266756887.

The spelling of 69642979 in words is "sixty-nine million, six hundred forty-two thousand, nine hundred seventy-nine".