1293773921 has 4 divisors (see below), whose sum is σ = 1411389744. Its totient is φ = 1176158100.

The previous prime is 1293773917. The next prime is 1293773941.

1293773921 is nontrivially palindromic in base 10.

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 1293773921 - 2² = 1293773917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1293773941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58807895 + ... + 58807916.

It is an arithmetic number, because the mean of its divisors is an integer number (352847436).

Almost surely, 2^1293773921 is an apocalyptic number.

1293773921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1293773921 is a deficient number, since it is larger than the sum of its proper divisors (117615823).

1293773921 is a wasteful number, since it uses less digits than its factorization.

1293773921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117615822.

The product of its digits is 142884, while the sum is 44.

The square root of 1293773921 is about 35969.0689481949. The cubic root of 1293773921 is about 1089.6477612232.

The spelling of 1293773921 in words is "one billion, two hundred ninety-three million, seven hundred seventy-three thousand, nine hundred twenty-one".