61097537 has 2 divisors, whose sum is σ = 61097538. Its totient is φ = 61097536.

The previous prime is 61097441. The next prime is 61097551. The reversal of 61097537 is 73579016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 3094081 = 7616^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 61097537 - 2²⁴ = 44320321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61097537.

It is not a weakly prime, because it can be changed into another prime (61097567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30548768 + 30548769.

It is an arithmetic number, because the mean of its divisors is an integer number (30548769).

Almost surely, 2^61097537 is an apocalyptic number.

It is an amenable number.

61097537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61097537 is an equidigital number, since it uses as much as digits as its factorization.

61097537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 61097537 is about 7816.4913484248. The cubic root of 61097537 is about 393.8594175802.

The spelling of 61097537 in words is "sixty-one million, ninety-seven thousand, five hundred thirty-seven".