1381963951 has 8 divisors (see below), whose sum is σ = 1409270400. Its totient is φ = 1354875480.

The previous prime is 1381963943. The next prime is 1381963981. The reversal of 1381963951 is 1593691831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381963951 - 2³ = 1381963943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381963981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41661 + ... + 67078.

It is an arithmetic number, because the mean of its divisors is an integer number (176158800).

Almost surely, 2^1381963951 is an apocalyptic number.

1381963951 is a deficient number, since it is larger than the sum of its proper divisors (27306449).

1381963951 is a wasteful number, since it uses less digits than its factorization.

1381963951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108989.

The product of its digits is 174960, while the sum is 46.

The square root of 1381963951 is about 37174.7757357055. The cubic root of 1381963951 is about 1113.8641804252.

The spelling of 1381963951 in words is "one billion, three hundred eighty-one million, nine hundred sixty-three thousand, nine hundred fifty-one".