61771097 has 2 divisors, whose sum is σ = 61771098. Its totient is φ = 61771096.

The previous prime is 61771049. The next prime is 61771103. The reversal of 61771097 is 79017716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54700816 + 7070281 = 7396^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 61771097 - 2²² = 57576793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61771097.

It is not a weakly prime, because it can be changed into another prime (61771027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30885548 + 30885549.

It is an arithmetic number, because the mean of its divisors is an integer number (30885549).

Almost surely, 2^61771097 is an apocalyptic number.

It is an amenable number.

61771097 is a deficient number, since it is larger than the sum of its proper divisors (1).

61771097 is an equidigital number, since it uses as much as digits as its factorization.

61771097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 38.

The square root of 61771097 is about 7859.4590780791. The cubic root of 61771097 is about 395.3014779025.

The spelling of 61771097 in words is "sixty-one million, seven hundred seventy-one thousand, ninety-seven".