61311037 has 2 divisors, whose sum is σ = 61311038. Its totient is φ = 61311036.

The previous prime is 61310987. The next prime is 61311067. The reversal of 61311037 is 73011316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55264356 + 6046681 = 7434^2 + 2459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61311037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61310999 and 61311017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61311067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30655518 + 30655519.

It is an arithmetic number, because the mean of its divisors is an integer number (30655519).

Almost surely, 2^61311037 is an apocalyptic number.

It is an amenable number.

61311037 is a deficient number, since it is larger than the sum of its proper divisors (1).

61311037 is an equidigital number, since it uses as much as digits as its factorization.

61311037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 61311037 is about 7830.1364611353. The cubic root of 61311037 is about 394.3176533361.

It can be divided in two parts, 613 and 11037, that multiplied together give a triangular number (6765681 = T₃₆₇₈).

The spelling of 61311037 in words is "sixty-one million, three hundred eleven thousand, thirty-seven".