70961 has 4 divisors (see below), whose sum is σ = 77424. Its totient is φ = 64500.

The previous prime is 70957. The next prime is 70969. The reversal of 70961 is 16907.

It is a happy number.

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 70961 - 2² = 70957 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3215 + ... + 3236.

It is an arithmetic number, because the mean of its divisors is an integer number (19356).

2⁷⁰⁹⁶¹ is an apocalyptic number.

It is an amenable number.

70961 is a deficient number, since it is larger than the sum of its proper divisors (6463).

70961 is a wasteful number, since it uses less digits than its factorization.

70961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6462.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 70961 is about 266.3850596411. The cubic root of 70961 is about 41.4005943266.

The spelling of 70961 in words is "seventy thousand, nine hundred sixty-one".