6989537 has 2 divisors, whose sum is σ = 6989538. Its totient is φ = 6989536.

The previous prime is 6989519. The next prime is 6989573. The reversal of 6989537 is 7359896.

Together with next prime (6989573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 312481 = 2584^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 6989537 - 2¹² = 6985441 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 9⁵ + 8⁷ + 9⁷ + 5⁵ + 3⁵ + 7³ .

It is a junction number, because it is equal to n+sod(n) for n = 6989491 and 6989500.

It is not a weakly prime, because it can be changed into another prime (6989137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494768 + 3494769.

It is an arithmetic number, because the mean of its divisors is an integer number (3494769).

Almost surely, 2^6989537 is an apocalyptic number.

It is an amenable number.

6989537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989537 is an equidigital number, since it uses as much as digits as its factorization.

6989537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The square root of 6989537 is about 2643.7732504888. The cubic root of 6989537 is about 191.1977612321.

The spelling of 6989537 in words is "six million, nine hundred eighty-nine thousand, five hundred thirty-seven".