61996897 has 4 divisors (see below), whose sum is σ = 62138560. Its totient is φ = 61855236.

The previous prime is 61996889. The next prime is 61996903. The reversal of 61996897 is 79869916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61996897 - 2³ = 61996889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61996817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70173 + ... + 71050.

It is an arithmetic number, because the mean of its divisors is an integer number (15534640).

Almost surely, 2^61996897 is an apocalyptic number.

It is an amenable number.

61996897 is a deficient number, since it is larger than the sum of its proper divisors (141663).

61996897 is a wasteful number, since it uses less digits than its factorization.

61996897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141662.

The product of its digits is 1469664, while the sum is 55.

The square root of 61996897 is about 7873.8108308493. The cubic root of 61996897 is about 395.7825579882.

The spelling of 61996897 in words is "sixty-one million, nine hundred ninety-six thousand, eight hundred ninety-seven".