6940000157 has 2 divisors, whose sum is σ = 6940000158. Its totient is φ = 6940000156.

The previous prime is 6940000103. The next prime is 6940000159. The reversal of 6940000157 is 7510000496.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6602212516 + 337787641 = 81254^2 + 18379^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940000157 - 2¹⁰ = 6939999133 is a prime.

Together with 6940000159, 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 (6940000159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470000078 + 3470000079.

It is an arithmetic number, because the mean of its divisors is an integer number (3470000079).

Almost surely, 2^6940000157 is an apocalyptic number.

It is an amenable number.

6940000157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6940000157 is an equidigital number, since it uses as much as digits as its factorization.

6940000157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6940000157 is about 83306.6633409357. The cubic root of 6940000157 is about 1907.4499889379.

The spelling of 6940000157 in words is "six billion, nine hundred forty million, one hundred fifty-seven", and thus it is an aban number.