69961 has 4 divisors (see below), whose sum is σ = 71632. Its totient is φ = 68292.

The previous prime is 69959. The next prime is 69991. The reversal of 69961 is 16996.

69961 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69961 - 2¹ = 69959 is a prime.

It is the 265-th Hogben number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (69911) by changing a digit.

It is a nontrivial repunit in base 264.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (17908).

2⁶⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

69961 is a deficient number, since it is larger than the sum of its proper divisors (1671).

69961 is a wasteful number, since it uses less digits than its factorization.

69961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670.

The product of its digits is 2916, while the sum is 31.

The square root of 69961 is about 264.5014177656. The cubic root of 69961 is about 41.2051977607.

The spelling of 69961 in words is "sixty-nine thousand, nine hundred sixty-one".