39979801 has 16 divisors (see below), whose sum is σ = 44167680. Its totient is φ = 36023040.

The previous prime is 39979769. The next prime is 39979813. The reversal of 39979801 is 10897993.

It is a cyclic number.

It is not a de Polignac number, because 39979801 - 2⁵ = 39979769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39979831) 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, 56035 + ... + 56743.

It is an arithmetic number, because the mean of its divisors is an integer number (2760480).

Almost surely, 2^39979801 is an apocalyptic number.

39979801 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39979801 is a deficient number, since it is larger than the sum of its proper divisors (4187879).

39979801 is a wasteful number, since it uses less digits than its factorization.

39979801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 39979801 is about 6322.9582475294. The cubic root of 39979801 is about 341.9376133025.

It can be divided in two parts, 399 and 79801, that added together give a triangular number (80200 = T₄₀₀).

The spelling of 39979801 in words is "thirty-nine million, nine hundred seventy-nine thousand, eight hundred one".