1979801 has 8 divisors (see below), whose sum is σ = 2063880. Its totient is φ = 1896832.

The previous prime is 1979779. The next prime is 1979807. The reversal of 1979801 is 1089791.

It can be written as a sum of positive squares in 4 ways, for example, as 491401 + 1488400 = 701^2 + 1220^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1979801 is a prime.

It is a super-2 number, since 2×1979801² = 7839223999202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979807) 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, 6611 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (257985).

2^1979801 is an apocalyptic number.

It is an amenable number.

1979801 is a deficient number, since it is larger than the sum of its proper divisors (84079).

1979801 is a wasteful number, since it uses less digits than its factorization.

1979801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1979801 is about 1407.0540145993. The cubic root of 1979801 is about 125.5665165928.

The spelling of 1979801 in words is "one million, nine hundred seventy-nine thousand, eight hundred one".