39979555 has 16 divisors (see below), whose sum is σ = 59814144. Its totient is φ = 24922080.

The previous prime is 39979517. The next prime is 39979559. The reversal of 39979555 is 55597993.

It is a happy number.

It is not a de Polignac number, because 39979555 - 2¹³ = 39971363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39979559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51537 + ... + 52306.

It is an arithmetic number, because the mean of its divisors is an integer number (3738384).

Almost surely, 2^39979555 is an apocalyptic number.

39979555 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39979555 is a deficient number, since it is larger than the sum of its proper divisors (19834589).

39979555 is a wasteful number, since it uses less digits than its factorization.

39979555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103866.

The product of its digits is 1913625, while the sum is 52.

The square root of 39979555 is about 6322.9387945796. The cubic root of 39979555 is about 341.9369119748.

The spelling of 39979555 in words is "thirty-nine million, nine hundred seventy-nine thousand, five hundred fifty-five".