7977401 has 4 divisors (see below), whose sum is σ = 8127972. Its totient is φ = 7826832.

The previous prime is 7977353. The next prime is 7977433. The reversal of 7977401 is 1047797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 1092025 = 2624^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7977401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7971401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75206 + ... + 75311.

It is an arithmetic number, because the mean of its divisors is an integer number (2031993).

Almost surely, 2^7977401 is an apocalyptic number.

It is an amenable number.

7977401 is a deficient number, since it is larger than the sum of its proper divisors (150571).

7977401 is a wasteful number, since it uses less digits than its factorization.

7977401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150570.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 7977401 is about 2824.4293228898. The cubic root of 7977401 is about 199.8114973896.

The spelling of 7977401 in words is "seven million, nine hundred seventy-seven thousand, four hundred one".