61541797 has 2 divisors, whose sum is σ = 61541798. Its totient is φ = 61541796.

The previous prime is 61541771. The next prime is 61541801. The reversal of 61541797 is 79714516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 60516 = 7841^2 + 246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61541797 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61541297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770898 + 30770899.

It is an arithmetic number, because the mean of its divisors is an integer number (30770899).

Almost surely, 2^61541797 is an apocalyptic number.

It is an amenable number.

61541797 is a deficient number, since it is larger than the sum of its proper divisors (1).

61541797 is an equidigital number, since it uses as much as digits as its factorization.

61541797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 61541797 is about 7844.8579974401. The cubic root of 61541797 is about 394.8117395886.

The spelling of 61541797 in words is "sixty-one million, five hundred forty-one thousand, seven hundred ninety-seven".