61938919 has 8 divisors (see below), whose sum is σ = 71106560. Its totient is φ = 52851096.

The previous prime is 61938913. The next prime is 61938937. The reversal of 61938919 is 91983916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61938919 - 2¹³ = 61930727 is a prime.

It is a super-2 number, since 2×61938919² = 7672859373777122, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61938913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18279 + ... + 21400.

It is an arithmetic number, because the mean of its divisors is an integer number (8888320).

Almost surely, 2^61938919 is an apocalyptic number.

61938919 is a deficient number, since it is larger than the sum of its proper divisors (9167641).

61938919 is a wasteful number, since it uses less digits than its factorization.

61938919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39909.

The product of its digits is 104976, while the sum is 46.

The square root of 61938919 is about 7870.1282708734. The cubic root of 61938919 is about 395.6591440807.

The spelling of 61938919 in words is "sixty-one million, nine hundred thirty-eight thousand, nine hundred nineteen".