61939983 has 8 divisors (see below), whose sum is σ = 94384768. Its totient is φ = 35394264.

The previous prime is 61939979. The next prime is 61939991. The reversal of 61939983 is 38993916.

It is a happy number.

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

It is not a de Polignac number, because 61939983 - 2² = 61939979 is a prime.

It is a super-2 number, since 2×61939983² = 7673122988080578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61939973) 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, 1474741 + ... + 1474782.

It is an arithmetic number, because the mean of its divisors is an integer number (11798096).

Almost surely, 2^61939983 is an apocalyptic number.

61939983 is a deficient number, since it is larger than the sum of its proper divisors (32444785).

61939983 is a wasteful number, since it uses less digits than its factorization.

61939983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949533.

The product of its digits is 314928, while the sum is 48.

The square root of 61939983 is about 7870.1958679565. The cubic root of 61939983 is about 395.6614096402.

The spelling of 61939983 in words is "sixty-one million, nine hundred thirty-nine thousand, nine hundred eighty-three".