1378476747 has 6 divisors (see below), whose sum is σ = 1991133092. Its totient is φ = 918984492.

The previous prime is 1378476731. The next prime is 1378476763. The reversal of 1378476747 is 7476748731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1378476731) and next prime (1378476763).

It is not a de Polignac number, because 1378476747 - 2⁴ = 1378476731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378476693 and 1378476702.

It is not an unprimeable number, because it can be changed into a prime (1378476347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76582033 + ... + 76582050.

Almost surely, 2^1378476747 is an apocalyptic number.

1378476747 is a deficient number, since it is larger than the sum of its proper divisors (612656345).

1378476747 is a wasteful number, since it uses less digits than its factorization.

1378476747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153164089 (or 153164086 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 54.

The square root of 1378476747 is about 37127.8432850603. The cubic root of 1378476747 is about 1112.9264947594.

The spelling of 1378476747 in words is "one billion, three hundred seventy-eight million, four hundred seventy-six thousand, seven hundred forty-seven".