61040537 has 2 divisors, whose sum is σ = 61040538. Its totient is φ = 61040536.

The previous prime is 61040533. The next prime is 61040543. The reversal of 61040537 is 73504016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32535616 + 28504921 = 5704^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 61040537 - 2² = 61040533 is a prime.

It is equal to p_3620294 and since 61040537 and 3620294 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61040533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30520268 + 30520269.

It is an arithmetic number, because the mean of its divisors is an integer number (30520269).

Almost surely, 2^61040537 is an apocalyptic number.

It is an amenable number.

61040537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61040537 is an equidigital number, since it uses as much as digits as its factorization.

61040537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 61040537 is about 7812.8443604106. The cubic root of 61040537 is about 393.7368977920.

The spelling of 61040537 in words is "sixty-one million, forty thousand, five hundred thirty-seven".