50651989 has 2 divisors, whose sum is σ = 50651990. Its totient is φ = 50651988.

The previous prime is 50651977. The next prime is 50652011. The reversal of 50651989 is 98915605.

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., 37271025 + 13380964 = 6105^2 + 3658^2 .

It is a cyclic number.

It is not a de Polignac number, because 50651989 - 2¹⁵ = 50619221 is a prime.

It is a super-2 number, since 2×50651989² = 5131247979312242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50651969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25325994 + 25325995.

It is an arithmetic number, because the mean of its divisors is an integer number (25325995).

Almost surely, 2^50651989 is an apocalyptic number.

It is an amenable number.

50651989 is a deficient number, since it is larger than the sum of its proper divisors (1).

50651989 is an equidigital number, since it uses as much as digits as its factorization.

50651989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 50651989 is about 7117.0210762650. The cubic root of 50651989 is about 369.9975383328.

The spelling of 50651989 in words is "fifty million, six hundred fifty-one thousand, nine hundred eighty-nine".