3970157 has 2 divisors, whose sum is σ = 3970158. Its totient is φ = 3970156.

The previous prime is 3970151. The next prime is 3970159. The reversal of 3970157 is 7510793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3924361 + 45796 = 1981^2 + 214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3970157 is a prime.

Together with 3970159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3970151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985078 + 1985079.

It is an arithmetic number, because the mean of its divisors is an integer number (1985079).

Almost surely, 2^3970157 is an apocalyptic number.

It is an amenable number.

3970157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3970157 is an equidigital number, since it uses as much as digits as its factorization.

3970157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 3970157 is about 1992.5252821483. The cubic root of 3970157 is about 158.3443459253.

The spelling of 3970157 in words is "three million, nine hundred seventy thousand, one hundred fifty-seven".