61227913 has 2 divisors, whose sum is σ = 61227914. Its totient is φ = 61227912.

The previous prime is 61227893. The next prime is 61227919. The reversal of 61227913 is 31972216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57335184 + 3892729 = 7572^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 61227913 - 2⁹ = 61227401 is a prime.

It is not a weakly prime, because it can be changed into another prime (61227919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30613956 + 30613957.

It is an arithmetic number, because the mean of its divisors is an integer number (30613957).

Almost surely, 2^61227913 is an apocalyptic number.

It is an amenable number.

61227913 is a deficient number, since it is larger than the sum of its proper divisors (1).

61227913 is an equidigital number, since it uses as much as digits as its factorization.

61227913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 61227913 is about 7824.8267073463. The cubic root of 61227913 is about 394.1393706741.

The spelling of 61227913 in words is "sixty-one million, two hundred twenty-seven thousand, nine hundred thirteen".