1381503953 has 2 divisors, whose sum is σ = 1381503954. Its totient is φ = 1381503952.

The previous prime is 1381503931. The next prime is 1381503961. The reversal of 1381503953 is 3593051831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184185744 + 197318209 = 34412^2 + 14047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381503953 - 2¹² = 1381499857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381503923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690751976 + 690751977.

It is an arithmetic number, because the mean of its divisors is an integer number (690751977).

Almost surely, 2^1381503953 is an apocalyptic number.

It is an amenable number.

1381503953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381503953 is an equidigital number, since it uses as much as digits as its factorization.

1381503953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1381503953 is about 37168.5882567525. The cubic root of 1381503953 is about 1113.7405804439.

The spelling of 1381503953 in words is "one billion, three hundred eighty-one million, five hundred three thousand, nine hundred fifty-three".