6820157 has 2 divisors, whose sum is σ = 6820158. Its totient is φ = 6820156.

The previous prime is 6820147. The next prime is 6820169. The reversal of 6820157 is 7510286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4084441 + 2735716 = 2021^2 + 1654^2 .

It is a cyclic number.

It is not a de Polignac number, because 6820157 - 2⁴ = 6820141 is a prime.

It is a Chen prime.

It is equal to p₄₆₅₁₇₆ and since 6820157 and 465176 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6820117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410078 + 3410079.

It is an arithmetic number, because the mean of its divisors is an integer number (3410079).

Almost surely, 2^6820157 is an apocalyptic number.

It is an amenable number.

6820157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820157 is an equidigital number, since it uses as much as digits as its factorization.

6820157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 6820157 is about 2611.5430304707. The cubic root of 6820157 is about 189.6406596943.

The spelling of 6820157 in words is "six million, eight hundred twenty thousand, one hundred fifty-seven".