103721357 has 2 divisors, whose sum is σ = 103721358. Its totient is φ = 103721356.

The previous prime is 103721353. The next prime is 103721389. The reversal of 103721357 is 753127301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102131236 + 1590121 = 10106^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 103721357 - 2² = 103721353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103721353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51860678 + 51860679.

It is an arithmetic number, because the mean of its divisors is an integer number (51860679).

Almost surely, 2^103721357 is an apocalyptic number.

It is an amenable number.

103721357 is a deficient number, since it is larger than the sum of its proper divisors (1).

103721357 is an equidigital number, since it uses as much as digits as its factorization.

103721357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 103721357 is about 10184.3682671042. The cubic root of 103721357 is about 469.8465728269.

Adding to 103721357 its reverse (753127301), we get a palindrome (856848658).

The spelling of 103721357 in words is "one hundred three million, seven hundred twenty-one thousand, three hundred fifty-seven".