3978362407 has 2 divisors, whose sum is σ = 3978362408. Its totient is φ = 3978362406.

The previous prime is 3978362393. The next prime is 3978362441. The reversal of 3978362407 is 7042638793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978362407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3978362467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989181203 + 1989181204.

It is an arithmetic number, because the mean of its divisors is an integer number (1989181204).

Almost surely, 2^3978362407 is an apocalyptic number.

3978362407 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978362407 is an equidigital number, since it uses as much as digits as its factorization.

3978362407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The square root of 3978362407 is about 63074.2610499719. The cubic root of 3978362407 is about 1584.5335804801.

The spelling of 3978362407 in words is "three billion, nine hundred seventy-eight million, three hundred sixty-two thousand, four hundred seven".