971121693 has 8 divisors (see below), whose sum is σ = 1304144800. Its totient is φ = 642756528.

The previous prime is 971121689. The next prime is 971121707. The reversal of 971121693 is 396121179.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 971121693 - 2² = 971121689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971121493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163998 + ... + 1164831.

It is an arithmetic number, because the mean of its divisors is an integer number (163018100).

Almost surely, 2^971121693 is an apocalyptic number.

It is an amenable number.

971121693 is a deficient number, since it is larger than the sum of its proper divisors (333023107).

971121693 is a wasteful number, since it uses less digits than its factorization.

971121693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328971.

The product of its digits is 20412, while the sum is 39.

The square root of 971121693 is about 31162.8254976984. The cubic root of 971121693 is about 990.2797199591.

The spelling of 971121693 in words is "nine hundred seventy-one million, one hundred twenty-one thousand, six hundred ninety-three".