40651889 has 2 divisors, whose sum is σ = 40651890. Its totient is φ = 40651888.

The previous prime is 40651861. The next prime is 40651921. The reversal of 40651889 is 98815604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34810000 + 5841889 = 5900^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 40651889 - 2²⁰ = 39603313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40651829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20325944 + 20325945.

It is an arithmetic number, because the mean of its divisors is an integer number (20325945).

Almost surely, 2^40651889 is an apocalyptic number.

It is an amenable number.

40651889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40651889 is an equidigital number, since it uses as much as digits as its factorization.

40651889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 40651889 is about 6375.8833897743. The cubic root of 40651889 is about 343.8430446090.

The spelling of 40651889 in words is "forty million, six hundred fifty-one thousand, eight hundred eighty-nine".