7640537 has 4 divisors (see below), whose sum is σ = 7847076. Its totient is φ = 7434000.

The previous prime is 7640519. The next prime is 7640579. The reversal of 7640537 is 7350467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 755161 = 2624^2 + 869^2 .

It is a cyclic number.

It is not a de Polignac number, because 7640537 - 2¹² = 7636441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7690537) 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 in 3 ways as a sum of consecutive naturals, for example, 103214 + ... + 103287.

It is an arithmetic number, because the mean of its divisors is an integer number (1961769).

Almost surely, 2^7640537 is an apocalyptic number.

It is an amenable number.

7640537 is a deficient number, since it is larger than the sum of its proper divisors (206539).

7640537 is a wasteful number, since it uses less digits than its factorization.

7640537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206538.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 7640537 is about 2764.1521304009. The cubic root of 7640537 is about 196.9584544821.

It can be divided in two parts, 7640 and 537, that multiplied together give a triangular number (4102680 = T₂₈₆₄).

The spelling of 7640537 in words is "seven million, six hundred forty thousand, five hundred thirty-seven".