61871434 has 4 divisors (see below), whose sum is σ = 92807154. Its totient is φ = 30935716.

The previous prime is 61871417. The next prime is 61871461. The reversal of 61871434 is 43417816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 23493409 = 6195^2 + 4847^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61871434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15467857 + ... + 15467860.

Almost surely, 2^61871434 is an apocalyptic number.

61871434 is a deficient number, since it is larger than the sum of its proper divisors (30935720).

61871434 is a wasteful number, since it uses less digits than its factorization.

61871434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30935719.

The product of its digits is 16128, while the sum is 34.

The square root of 61871434 is about 7865.8396881706. The cubic root of 61871434 is about 395.5153962243.

The spelling of 61871434 in words is "sixty-one million, eight hundred seventy-one thousand, four hundred thirty-four".