69821961 has 12 divisors (see below), whose sum is σ = 102329136. Its totient is φ = 42316120.

The previous prime is 69821959. The next prime is 69821963. The reversal of 69821961 is 16912896.

It is an interprime number because it is at equal distance from previous prime (69821959) and next prime (69821963).

It is not a de Polignac number, because 69821961 - 2¹ = 69821959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69821963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95811 + ... + 96536.

It is an arithmetic number, because the mean of its divisors is an integer number (8527428).

Almost surely, 2^69821961 is an apocalyptic number.

It is an amenable number.

69821961 is a deficient number, since it is larger than the sum of its proper divisors (32507175).

69821961 is a wasteful number, since it uses less digits than its factorization.

69821961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192372 (or 192361 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 69821961 is about 8355.9536260082. The cubic root of 69821961 is about 411.7788288045.

The spelling of 69821961 in words is "sixty-nine million, eight hundred twenty-one thousand, nine hundred sixty-one".