61315069 has 2 divisors, whose sum is σ = 61315070. Its totient is φ = 61315068.

The previous prime is 61315013. The next prime is 61315081. The reversal of 61315069 is 96051316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50836900 + 10478169 = 7130^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 61315069 - 2¹³ = 61306877 is a prime.

It is a super-2 number, since 2×61315069² = 7519075372949522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61315069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61315369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30657534 + 30657535.

It is an arithmetic number, because the mean of its divisors is an integer number (30657535).

Almost surely, 2^61315069 is an apocalyptic number.

It is an amenable number.

61315069 is a deficient number, since it is larger than the sum of its proper divisors (1).

61315069 is an equidigital number, since it uses as much as digits as its factorization.

61315069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 61315069 is about 7830.3939236797. The cubic root of 61315069 is about 394.3262969888.

The spelling of 61315069 in words is "sixty-one million, three hundred fifteen thousand, sixty-nine".