61698923 has 16 divisors (see below), whose sum is σ = 72957696. Its totient is φ = 51438240.

The previous prime is 61698919. The next prime is 61698941. The reversal of 61698923 is 32989616.

It is a cyclic number.

It is not a de Polignac number, because 61698923 - 2² = 61698919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61698913) 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 15 ways as a sum of consecutive naturals, for example, 21986 + ... + 24632.

It is an arithmetic number, because the mean of its divisors is an integer number (4559856).

Almost surely, 2^61698923 is an apocalyptic number.

61698923 is a deficient number, since it is larger than the sum of its proper divisors (11258773).

61698923 is a wasteful number, since it uses less digits than its factorization.

61698923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834.

The product of its digits is 139968, while the sum is 44.

The square root of 61698923 is about 7854.8661987331. The cubic root of 61698923 is about 395.1474597654.

The spelling of 61698923 in words is "sixty-one million, six hundred ninety-eight thousand, nine hundred twenty-three".