3970320391 has 2 divisors, whose sum is σ = 3970320392. Its totient is φ = 3970320390.

The previous prime is 3970320383. The next prime is 3970320461. The reversal of 3970320391 is 1930230793.

It is a weak prime.

It is an emirp because it is prime and its reverse (1930230793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3970320391 - 2³ = 3970320383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3970320391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3970320491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985160195 + 1985160196.

It is an arithmetic number, because the mean of its divisors is an integer number (1985160196).

Almost surely, 2^3970320391 is an apocalyptic number.

3970320391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3970320391 is an equidigital number, since it uses as much as digits as its factorization.

3970320391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 3970320391 is about 63010.4784222434. The cubic root of 3970320391 is about 1583.4651810524.

The spelling of 3970320391 in words is "three billion, nine hundred seventy million, three hundred twenty thousand, three hundred ninety-one".