2190977 has 6 divisors (see below), whose sum is σ = 2326338. Its totient is φ = 2056352.

The previous prime is 2190971. The next prime is 2190983. The reversal of 2190977 is 7790912.

It is an interprime number because it is at equal distance from previous prime (2190971) and next prime (2190983).

It can be written as a sum of positive squares in only one way, i.e., 2062096 + 128881 = 1436^2 + 359^2 .

It is not a de Polignac number, because 2190977 - 2¹⁴ = 2174593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5924 + ... + 6282.

It is an arithmetic number, because the mean of its divisors is an integer number (387723).

2^2190977 is an apocalyptic number.

It is an amenable number.

2190977 is a deficient number, since it is larger than the sum of its proper divisors (135361).

2190977 is an frugal number, since it uses more digits than its factorization.

2190977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 2190977 is about 1480.1949195967. The cubic root of 2190977 is about 129.8810944310.

The spelling of 2190977 in words is "two million, one hundred ninety thousand, nine hundred seventy-seven".