61798691 has 2 divisors, whose sum is σ = 61798692. Its totient is φ = 61798690.

The previous prime is 61798687. The next prime is 61798721. The reversal of 61798691 is 19689716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61798691 - 2² = 61798687 is a prime.

It is not a weakly prime, because it can be changed into another prime (61798601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30899345 + 30899346.

It is an arithmetic number, because the mean of its divisors is an integer number (30899346).

Almost surely, 2^61798691 is an apocalyptic number.

61798691 is a deficient number, since it is larger than the sum of its proper divisors (1).

61798691 is an equidigital number, since it uses as much as digits as its factorization.

61798691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 61798691 is about 7861.2143463971. The cubic root of 61798691 is about 395.3603313452.

The spelling of 61798691 in words is "sixty-one million, seven hundred ninety-eight thousand, six hundred ninety-one".