1957350397 has 2 divisors, whose sum is σ = 1957350398. Its totient is φ = 1957350396.

The previous prime is 1957350383. The next prime is 1957350413. The reversal of 1957350397 is 7930537591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1913975001 + 43375396 = 43749^2 + 6586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957350397 - 2¹⁵ = 1957317629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1957350397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957350377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978675198 + 978675199.

It is an arithmetic number, because the mean of its divisors is an integer number (978675199).

Almost surely, 2^1957350397 is an apocalyptic number.

It is an amenable number.

1957350397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957350397 is an equidigital number, since it uses as much as digits as its factorization.

1957350397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 893025, while the sum is 49.

The square root of 1957350397 is about 44241.9529067151. The cubic root of 1957350397 is about 1250.9007687633.

The spelling of 1957350397 in words is "one billion, nine hundred fifty-seven million, three hundred fifty thousand, three hundred ninety-seven".