1378062631 has 4 divisors (see below), whose sum is σ = 1503341064. Its totient is φ = 1252784200.

The previous prime is 1378062617. The next prime is 1378062661. The reversal of 1378062631 is 1362608731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1378062631 - 2⁵ = 1378062599 is a prime.

It is a super-2 number, since 2×1378062631² = 3798113229917284322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378062661) 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 in 3 ways as a sum of consecutive naturals, for example, 62639200 + ... + 62639221.

It is an arithmetic number, because the mean of its divisors is an integer number (375835266).

Almost surely, 2^1378062631 is an apocalyptic number.

1378062631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1378062631 is a deficient number, since it is larger than the sum of its proper divisors (125278433).

1378062631 is a wasteful number, since it uses less digits than its factorization.

1378062631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125278432.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1378062631 is about 37122.2659734020. The cubic root of 1378062631 is about 1112.8150367487.

The spelling of 1378062631 in words is "one billion, three hundred seventy-eight million, sixty-two thousand, six hundred thirty-one".