61388797 has 2 divisors, whose sum is σ = 61388798. Its totient is φ = 61388796.

The previous prime is 61388783. The next prime is 61388837. The reversal of 61388797 is 79788316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39803481 + 21585316 = 6309^2 + 4646^2 .

It is a cyclic number.

It is not a de Polignac number, because 61388797 - 2⁷ = 61388669 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61388797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61388777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30694398 + 30694399.

It is an arithmetic number, because the mean of its divisors is an integer number (30694399).

Almost surely, 2^61388797 is an apocalyptic number.

It is an amenable number.

61388797 is a deficient number, since it is larger than the sum of its proper divisors (1).

61388797 is an equidigital number, since it uses as much as digits as its factorization.

61388797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 61388797 is about 7835.1003184388. The cubic root of 61388797 is about 394.4842855802.

The spelling of 61388797 in words is "sixty-one million, three hundred eighty-eight thousand, seven hundred ninety-seven".