61831811 has 2 divisors, whose sum is σ = 61831812. Its totient is φ = 61831810.

The previous prime is 61831789. The next prime is 61831829. The reversal of 61831811 is 11813816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61831811 - 2⁶ = 61831747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61831711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30915905 + 30915906.

It is an arithmetic number, because the mean of its divisors is an integer number (30915906).

Almost surely, 2^61831811 is an apocalyptic number.

61831811 is a deficient number, since it is larger than the sum of its proper divisors (1).

61831811 is an equidigital number, since it uses as much as digits as its factorization.

61831811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The square root of 61831811 is about 7863.3206090048. The cubic root of 61831811 is about 395.4309477041.

The spelling of 61831811 in words is "sixty-one million, eight hundred thirty-one thousand, eight hundred eleven".