61699137 has 32 divisors (see below), whose sum is σ = 93985920. Its totient is φ = 35758080.

The previous prime is 61699117. The next prime is 61699139. The reversal of 61699137 is 73199616.

61699137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61699137 - 2⁷ = 61699009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61699139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38953 + ... + 40505.

It is an arithmetic number, because the mean of its divisors is an integer number (2937060).

Almost surely, 2^61699137 is an apocalyptic number.

It is an amenable number.

61699137 is a deficient number, since it is larger than the sum of its proper divisors (32286783).

61699137 is a wasteful number, since it uses less digits than its factorization.

61699137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633.

The product of its digits is 61236, while the sum is 42.

The square root of 61699137 is about 7854.8798208502. The cubic root of 61699137 is about 395.1479166154.

The spelling of 61699137 in words is "sixty-one million, six hundred ninety-nine thousand, one hundred thirty-seven".