1941553387 has 2 divisors, whose sum is σ = 1941553388. Its totient is φ = 1941553386.

The previous prime is 1941553337. The next prime is 1941553417. The reversal of 1941553387 is 7833551491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1941553387 - 2¹⁵ = 1941520619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1941553337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970776693 + 970776694.

It is an arithmetic number, because the mean of its divisors is an integer number (970776694).

Almost surely, 2^1941553387 is an apocalyptic number.

1941553387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941553387 is an equidigital number, since it uses as much as digits as its factorization.

1941553387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The square root of 1941553387 is about 44063.0614801105. The cubic root of 1941553387 is about 1247.5264978850.

The spelling of 1941553387 in words is "one billion, nine hundred forty-one million, five hundred fifty-three thousand, three hundred eighty-seven".