61646723 has 2 divisors, whose sum is σ = 61646724. Its totient is φ = 61646722.

The previous prime is 61646707. The next prime is 61646729. The reversal of 61646723 is 32764616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61646723 - 2⁴ = 61646707 is a prime.

It is not a weakly prime, because it can be changed into another prime (61646729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30823361 + 30823362.

It is an arithmetic number, because the mean of its divisors is an integer number (30823362).

Almost surely, 2^61646723 is an apocalyptic number.

61646723 is a deficient number, since it is larger than the sum of its proper divisors (1).

61646723 is an equidigital number, since it uses as much as digits as its factorization.

61646723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 61646723 is about 7851.5427146517. The cubic root of 61646723 is about 395.0359909522.

The spelling of 61646723 in words is "sixty-one million, six hundred forty-six thousand, seven hundred twenty-three".