7951397 has 2 divisors, whose sum is σ = 7951398. Its totient is φ = 7951396.

The previous prime is 7951387. The next prime is 7951403. The reversal of 7951397 is 7931597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7540516 + 410881 = 2746^2 + 641^2 .

It is an emirp because it is prime and its reverse (7931597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7951397 - 2¹⁶ = 7885861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7951327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3975698 + 3975699.

It is an arithmetic number, because the mean of its divisors is an integer number (3975699).

Almost surely, 2^7951397 is an apocalyptic number.

It is an amenable number.

7951397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7951397 is an equidigital number, since it uses as much as digits as its factorization.

7951397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59535, while the sum is 41.

The square root of 7951397 is about 2819.8221575128. The cubic root of 7951397 is about 199.5941519940.

The spelling of 7951397 in words is "seven million, nine hundred fifty-one thousand, three hundred ninety-seven".