1173966921 has 6 divisors (see below), whose sum is σ = 1695730010. Its totient is φ = 782644608.

The previous prime is 1173966901. The next prime is 1173966923. The reversal of 1173966921 is 1296693711.

It can be written as a sum of positive squares in only one way, i.e., 1172103696 + 1863225 = 34236^2 + 1365^2 .

It is not a de Polignac number, because 1173966921 - 2¹³ = 1173958729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1173966923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65220376 + ... + 65220393.

Almost surely, 2^1173966921 is an apocalyptic number.

It is an amenable number.

1173966921 is a deficient number, since it is larger than the sum of its proper divisors (521763089).

1173966921 is a wasteful number, since it uses less digits than its factorization.

1173966921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130440775 (or 130440772 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 1173966921 is about 34263.2006823647. The cubic root of 1173966921 is about 1054.9177989757.

The spelling of 1173966921 in words is "one billion, one hundred seventy-three million, nine hundred sixty-six thousand, nine hundred twenty-one".