61844537 has 2 divisors, whose sum is σ = 61844538. Its totient is φ = 61844536.

The previous prime is 61844513. The next prime is 61844543. The reversal of 61844537 is 73544816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61763881 + 80656 = 7859^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 61844537 - 2¹⁰ = 61843513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61844537.

It is not a weakly prime, because it can be changed into another prime (61844557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922268 + 30922269.

It is an arithmetic number, because the mean of its divisors is an integer number (30922269).

Almost surely, 2^61844537 is an apocalyptic number.

It is an amenable number.

61844537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844537 is an equidigital number, since it uses as much as digits as its factorization.

61844537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 61844537 is about 7864.1297674949. The cubic root of 61844537 is about 395.4580745662.

The spelling of 61844537 in words is "sixty-one million, eight hundred forty-four thousand, five hundred thirty-seven".