61438699 has 6 divisors (see below), whose sum is σ = 71469564. Its totient is φ = 52661700.

The previous prime is 61438693. The next prime is 61438703. The reversal of 61438699 is 99683416.

It is not a de Polignac number, because 61438699 - 2³ = 61438691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61438691) 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 5 ways as a sum of consecutive naturals, for example, 626877 + ... + 626974.

It is an arithmetic number, because the mean of its divisors is an integer number (11911594).

Almost surely, 2^61438699 is an apocalyptic number.

61438699 is a deficient number, since it is larger than the sum of its proper divisors (10030865).

61438699 is a wasteful number, since it uses less digits than its factorization.

61438699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253865 (or 1253858 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 61438699 is about 7838.2841872440. The cubic root of 61438699 is about 394.5911466806.

The spelling of 61438699 in words is "sixty-one million, four hundred thirty-eight thousand, six hundred ninety-nine".