61903407 has 4 divisors (see below), whose sum is σ = 82537880. Its totient is φ = 41268936.

The previous prime is 61903403. The next prime is 61903421. The reversal of 61903407 is 70430916.

It is a happy number.

61903407 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 not a de Polignac number, because 61903407 - 2² = 61903403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61903403) 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 3 ways as a sum of consecutive naturals, for example, 10317232 + ... + 10317237.

It is an arithmetic number, because the mean of its divisors is an integer number (20634470).

Almost surely, 2^61903407 is an apocalyptic number.

61903407 is a deficient number, since it is larger than the sum of its proper divisors (20634473).

61903407 is a wasteful number, since it uses less digits than its factorization.

61903407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20634472.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 61903407 is about 7867.8718215284. The cubic root of 61903407 is about 395.5835140145.

The spelling of 61903407 in words is "sixty-one million, nine hundred three thousand, four hundred seven".