1381264733 has 2 divisors, whose sum is σ = 1381264734. Its totient is φ = 1381264732.

The previous prime is 1381264681. The next prime is 1381264783. The reversal of 1381264733 is 3374621831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180815769 + 200448964 = 34363^2 + 14158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381264733 - 2¹⁸ = 1381002589 is a prime.

It is a super-2 number, since 2×1381264733² = 3815784525259122578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381264783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690632366 + 690632367.

It is an arithmetic number, because the mean of its divisors is an integer number (690632367).

Almost surely, 2^1381264733 is an apocalyptic number.

It is an amenable number.

1381264733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381264733 is an equidigital number, since it uses as much as digits as its factorization.

1381264733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 1381264733 is about 37165.3700775332. The cubic root of 1381264733 is about 1113.6762919558.

The spelling of 1381264733 in words is "one billion, three hundred eighty-one million, two hundred sixty-four thousand, seven hundred thirty-three".