4137508981 has 2 divisors, whose sum is σ = 4137508982. Its totient is φ = 4137508980.

The previous prime is 4137508933. The next prime is 4137508987. The reversal of 4137508981 is 1898057314.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4123566225 + 13942756 = 64215^2 + 3734^2 .

It is a cyclic number.

It is not a de Polignac number, because 4137508981 - 2²¹ = 4135411829 is a prime.

It is a super-2 number, since 2×4137508981² = 34237961135711316722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4137508987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2068754490 + 2068754491.

It is an arithmetic number, because the mean of its divisors is an integer number (2068754491).

Almost surely, 2^4137508981 is an apocalyptic number.

It is an amenable number.

4137508981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4137508981 is an equidigital number, since it uses as much as digits as its factorization.

4137508981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 4137508981 is about 64323.4714626006. The cubic root of 4137508981 is about 1605.3866598178.

The spelling of 4137508981 in words is "four billion, one hundred thirty-seven million, five hundred eight thousand, nine hundred eighty-one".