1346887921 has 2 divisors, whose sum is σ = 1346887922. Its totient is φ = 1346887920.

The previous prime is 1346887873. The next prime is 1346887937. The reversal of 1346887921 is 1297886431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252098225 + 94789696 = 35385^2 + 9736^2 .

It is an emirp because it is prime and its reverse (1297886431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1346887921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1346887121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673443960 + 673443961.

It is an arithmetic number, because the mean of its divisors is an integer number (673443961).

Almost surely, 2^1346887921 is an apocalyptic number.

It is an amenable number.

1346887921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346887921 is an equidigital number, since it uses as much as digits as its factorization.

1346887921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 1346887921 is about 36699.9716757384. The cubic root of 1346887921 is about 1104.3595371304.

It can be divided in two parts, 13468879 and 21, that added together give a square (13468900 = 3670²).

The spelling of 1346887921 in words is "one billion, three hundred forty-six million, eight hundred eighty-seven thousand, nine hundred twenty-one".