1403673561 has 12 divisors (see below), whose sum is σ = 2146795092. Its totient is φ = 880736256.

The previous prime is 1403673559. The next prime is 1403673599. The reversal of 1403673561 is 1653763041.

It can be written as a sum of positive squares in 2 ways, for example, as 570254400 + 833419161 = 23880^2 + 28869^2 .

It is not a de Polignac number, because 1403673561 - 2¹ = 1403673559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1403673541) 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, 4587016 + ... + 4587321.

It is an arithmetic number, because the mean of its divisors is an integer number (178899591).

Almost surely, 2^1403673561 is an apocalyptic number.

It is an amenable number.

1403673561 is a deficient number, since it is larger than the sum of its proper divisors (743121531).

1403673561 is a wasteful number, since it uses less digits than its factorization.

1403673561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174360 (or 9174357 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 1403673561 is about 37465.6317309611. The cubic root of 1403673561 is about 1119.6665570414. Note that the first 3 decimals are identical.

The spelling of 1403673561 in words is "one billion, four hundred three million, six hundred seventy-three thousand, five hundred sixty-one".