7542989 has 2 divisors, whose sum is σ = 7542990. Its totient is φ = 7542988.

The previous prime is 7542979. The next prime is 7542991. The reversal of 7542989 is 9892457.

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., 4338889 + 3204100 = 2083^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 7542989 - 2¹² = 7538893 is a prime.

It is a Sophie Germain prime.

Together with 7542991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7542979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771494 + 3771495.

It is an arithmetic number, because the mean of its divisors is an integer number (3771495).

Almost surely, 2^7542989 is an apocalyptic number.

It is an amenable number.

7542989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7542989 is an equidigital number, since it uses as much as digits as its factorization.

7542989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 7542989 is about 2746.4502544193. The cubic root of 7542989 is about 196.1166614240.

The spelling of 7542989 in words is "seven million, five hundred forty-two thousand, nine hundred eighty-nine".