1263887373 has 32 divisors (see below), whose sum is σ = 1949009920. Its totient is φ = 713603520.

The previous prime is 1263887369. The next prime is 1263887393. The reversal of 1263887373 is 3737883621.

It is not a de Polignac number, because 1263887373 - 2² = 1263887369 is a prime.

It is a super-2 number, since 2×1263887373² = 3194822583257682258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263887323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1306536 + ... + 1307502.

It is an arithmetic number, because the mean of its divisors is an integer number (60906560).

Almost surely, 2^1263887373 is an apocalyptic number.

It is an amenable number.

1263887373 is a deficient number, since it is larger than the sum of its proper divisors (685122547).

1263887373 is a wasteful number, since it uses less digits than its factorization.

1263887373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657.

The product of its digits is 1016064, while the sum is 48.

The square root of 1263887373 is about 35551.1936930393. The cubic root of 1263887373 is about 1081.1919205307.

The spelling of 1263887373 in words is "one billion, two hundred sixty-three million, eight hundred eighty-seven thousand, three hundred seventy-three".