1378354957 has 12 divisors (see below), whose sum is σ = 1604618400. Its totient is φ = 1180543896.

The previous prime is 1378354937. The next prime is 1378354973. The reversal of 1378354957 is 7594538731.

It is not a de Polignac number, because 1378354957 - 2¹¹ = 1378352909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378354907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58498 + ... + 78604.

It is an arithmetic number, because the mean of its divisors is an integer number (133718200).

Almost surely, 2^1378354957 is an apocalyptic number.

It is an amenable number.

1378354957 is a deficient number, since it is larger than the sum of its proper divisors (226263443).

1378354957 is a wasteful number, since it uses less digits than its factorization.

1378354957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21520 (or 21513 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 52.

The square root of 1378354957 is about 37126.2031050847. The cubic root of 1378354957 is about 1112.8937176837.

The spelling of 1378354957 in words is "one billion, three hundred seventy-eight million, three hundred fifty-four thousand, nine hundred fifty-seven".