61650897 has 32 divisors (see below), whose sum is σ = 106030080. Its totient is φ = 30918720.

The previous prime is 61650881. The next prime is 61650899. The reversal of 61650897 is 79805616.

It is not a de Polignac number, because 61650897 - 2⁴ = 61650881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61650899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2098 + ... + 11300.

It is an arithmetic number, because the mean of its divisors is an integer number (3313440).

Almost surely, 2^61650897 is an apocalyptic number.

It is an amenable number.

61650897 is a deficient number, since it is larger than the sum of its proper divisors (44379183).

61650897 is a wasteful number, since it uses less digits than its factorization.

61650897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 61650897 is about 7851.8085177875. The cubic root of 61650897 is about 395.0449065006.

It can be divided in two parts, 616508 and 97, that added together give a triangular number (616605 = T₁₁₁₀).

The spelling of 61650897 in words is "sixty-one million, six hundred fifty thousand, eight hundred ninety-seven".