7738981 has 2 divisors, whose sum is σ = 7738982. Its totient is φ = 7738980.

The previous prime is 7738967. The next prime is 7738987. The reversal of 7738981 is 1898377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6937956 + 801025 = 2634^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 7738981 - 2¹⁷ = 7607909 is a prime.

It is a super-2 number, since 2×7738981² = 119783653836722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7738987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3869490 + 3869491.

It is an arithmetic number, because the mean of its divisors is an integer number (3869491).

Almost surely, 2^7738981 is an apocalyptic number.

It is an amenable number.

7738981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7738981 is an equidigital number, since it uses as much as digits as its factorization.

7738981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 7738981 is about 2781.9024066275. The cubic root of 7738981 is about 197.8007467351.

The spelling of 7738981 in words is "seven million, seven hundred thirty-eight thousand, nine hundred eighty-one".