61689371 has 12 divisors (see below), whose sum is σ = 66011400. Its totient is φ = 57483360.

The previous prime is 61689367. The next prime is 61689373. The reversal of 61689371 is 17398616.

It is not a de Polignac number, because 61689371 - 2² = 61689367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61689373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322886 + ... + 323076.

It is an arithmetic number, because the mean of its divisors is an integer number (5500950).

Almost surely, 2^61689371 is an apocalyptic number.

61689371 is a deficient number, since it is larger than the sum of its proper divisors (4322029).

61689371 is an equidigital number, since it uses as much as digits as its factorization.

61689371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 299 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 61689371 is about 7854.2581444717. The cubic root of 61689371 is about 395.1270669549.

The spelling of 61689371 in words is "sixty-one million, six hundred eighty-nine thousand, three hundred seventy-one".