61917398 has 4 divisors (see below), whose sum is σ = 92876100. Its totient is φ = 30958698.

The previous prime is 61917367. The next prime is 61917431. The reversal of 61917398 is 89371916.

61917398 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, 15479348 + ... + 15479351.

It is an arithmetic number, because the mean of its divisors is an integer number (23219025).

Almost surely, 2^61917398 is an apocalyptic number.

61917398 is a deficient number, since it is larger than the sum of its proper divisors (30958702).

61917398 is a wasteful number, since it uses less digits than its factorization.

61917398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958701.

The product of its digits is 81648, while the sum is 44.

The square root of 61917398 is about 7868.7608935588. The cubic root of 61917398 is about 395.6133141623.

The spelling of 61917398 in words is "sixty-one million, nine hundred seventeen thousand, three hundred ninety-eight".