61811297 has 2 divisors, whose sum is σ = 61811298. Its totient is φ = 61811296.

The previous prime is 61811287. The next prime is 61811317. The reversal of 61811297 is 79211816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52070656 + 9740641 = 7216^2 + 3121^2 .

It is a cyclic number.

It is not a de Polignac number, because 61811297 - 2²⁴ = 45034081 is a prime.

It is not a weakly prime, because it can be changed into another prime (61811287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30905648 + 30905649.

It is an arithmetic number, because the mean of its divisors is an integer number (30905649).

Almost surely, 2^61811297 is an apocalyptic number.

It is an amenable number.

61811297 is a deficient number, since it is larger than the sum of its proper divisors (1).

61811297 is an equidigital number, since it uses as much as digits as its factorization.

61811297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 61811297 is about 7862.0160900370. The cubic root of 61811297 is about 395.3872120305.

The spelling of 61811297 in words is "sixty-one million, eight hundred eleven thousand, two hundred ninety-seven".