49689121 has 2 divisors, whose sum is σ = 49689122. Its totient is φ = 49689120.

The previous prime is 49689109. The next prime is 49689127. The reversal of 49689121 is 12198694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27973521 + 21715600 = 5289^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 49689121 - 2⁹ = 49688609 is a prime.

It is not a weakly prime, because it can be changed into another prime (49689127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24844560 + 24844561.

It is an arithmetic number, because the mean of its divisors is an integer number (24844561).

Almost surely, 2^49689121 is an apocalyptic number.

It is an amenable number.

49689121 is a deficient number, since it is larger than the sum of its proper divisors (1).

49689121 is an equidigital number, since it uses as much as digits as its factorization.

49689121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 49689121 is about 7049.0510708889. The cubic root of 49689121 is about 367.6380365964.

The spelling of 49689121 in words is "forty-nine million, six hundred eighty-nine thousand, one hundred twenty-one".