1293433921 has 8 divisors (see below), whose sum is σ = 1396408104. Its totient is φ = 1190956800.

The previous prime is 1293433879. The next prime is 1293433927. The reversal of 1293433921 is 1293343921.

It can be written as a sum of positive squares in 4 ways, for example, as 56927025 + 1236506896 = 7545^2 + 35164^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1293433921 - 2²³ = 1285045313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1293433927) 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, 118846 + ... + 129271.

It is an arithmetic number, because the mean of its divisors is an integer number (174551013).

Almost surely, 2^1293433921 is an apocalyptic number.

It is an amenable number.

1293433921 is a deficient number, since it is larger than the sum of its proper divisors (102974183).

1293433921 is a wasteful number, since it uses less digits than its factorization.

1293433921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248531.

The product of its digits is 34992, while the sum is 37.

The square root of 1293433921 is about 35964.3423546156. The cubic root of 1293433921 is about 1089.5523007796.

Subtracting from 1293433921 its reverse (1293343921), we obtain a square (90000 = 300²).

The spelling of 1293433921 in words is "one billion, two hundred ninety-three million, four hundred thirty-three thousand, nine hundred twenty-one".