7658401 has 2 divisors, whose sum is σ = 7658402. Its totient is φ = 7658400.

The previous prime is 7658393. The next prime is 7658419. The reversal of 7658401 is 1048567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 1002001 = 2580^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 7658401 - 2³ = 7658393 is a prime.

It is a super-2 number, since 2×7658401² = 117302211753602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7658461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3829200 + 3829201.

It is an arithmetic number, because the mean of its divisors is an integer number (3829201).

Almost surely, 2^7658401 is an apocalyptic number.

It is an amenable number.

7658401 is a deficient number, since it is larger than the sum of its proper divisors (1).

7658401 is an equidigital number, since it uses as much as digits as its factorization.

7658401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 7658401 is about 2767.3816144507. The cubic root of 7658401 is about 197.1118349432. Note that the first 3 decimals are identical.

The spelling of 7658401 in words is "seven million, six hundred fifty-eight thousand, four hundred one".