61399942 has 4 divisors (see below), whose sum is σ = 92099916. Its totient is φ = 30699970.

The previous prime is 61399913. The next prime is 61399957. The reversal of 61399942 is 24999316.

61399942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 15349984 + ... + 15349987.

It is an arithmetic number, because the mean of its divisors is an integer number (23024979).

Almost surely, 2^61399942 is an apocalyptic number.

61399942 is a deficient number, since it is larger than the sum of its proper divisors (30699974).

61399942 is a wasteful number, since it uses less digits than its factorization.

61399942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30699973.

The product of its digits is 104976, while the sum is 43.

The square root of 61399942 is about 7835.8115087080. The cubic root of 61399942 is about 394.5081567182.

The spelling of 61399942 in words is "sixty-one million, three hundred ninety-nine thousand, nine hundred forty-two".