230121637 has 2 divisors, whose sum is σ = 230121638. Its totient is φ = 230121636.

The previous prime is 230121631. The next prime is 230121677. The reversal of 230121637 is 736121032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229037956 + 1083681 = 15134^2 + 1041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230121637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230121631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115060818 + 115060819.

It is an arithmetic number, because the mean of its divisors is an integer number (115060819).

Almost surely, 2^230121637 is an apocalyptic number.

It is an amenable number.

230121637 is a deficient number, since it is larger than the sum of its proper divisors (1).

230121637 is an equidigital number, since it uses as much as digits as its factorization.

230121637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 230121637 is about 15169.7606111632. The cubic root of 230121637 is about 612.8005573081.

Adding to 230121637 its reverse (736121032), we get a palindrome (966242669).

It can be divided in two parts, 23012 and 1637, that added together give a square (24649 = 157²).

The spelling of 230121637 in words is "two hundred thirty million, one hundred twenty-one thousand, six hundred thirty-seven".