1972709 has 4 divisors (see below), whose sum is σ = 1997760. Its totient is φ = 1947660.

The previous prime is 1972669. The next prime is 1972717. The reversal of 1972709 is 9072791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1972709 - 2¹² = 1968613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972739) 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, 12407 + ... + 12564.

It is an arithmetic number, because the mean of its divisors is an integer number (499440).

2^1972709 is an apocalyptic number.

It is an amenable number.

1972709 is a deficient number, since it is larger than the sum of its proper divisors (25051).

1972709 is an equidigital number, since it uses as much as digits as its factorization.

1972709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25050.

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

The square root of 1972709 is about 1404.5315945183. The cubic root of 1972709 is about 125.4164033259.

The spelling of 1972709 in words is "one million, nine hundred seventy-two thousand, seven hundred nine".