7609945 has 24 divisors (see below), whose sum is σ = 10773000. Its totient is φ = 5144832.

The previous prime is 7609909. The next prime is 7609957. The reversal of 7609945 is 5499067.

It can be written as a sum of positive squares in 4 ways, for example, as 571536 + 7038409 = 756^2 + 2653^2 .

It is not a de Polignac number, because 7609945 - 2¹⁵ = 7577177 is a prime.

It is a super-2 number, since 2×7609945² = 115822525806050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7609898 and 7609907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21631 + ... + 21979.

It is an arithmetic number, because the mean of its divisors is an integer number (448875).

Almost surely, 2^7609945 is an apocalyptic number.

7609945 is the 1745-th heptagonal number.

It is an amenable number.

7609945 is a deficient number, since it is larger than the sum of its proper divisors (3163055).

7609945 is a wasteful number, since it uses less digits than its factorization.

7609945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 7609945 is about 2758.6128760665. The cubic root of 7609945 is about 196.6952350851.

The spelling of 7609945 in words is "seven million, six hundred nine thousand, nine hundred forty-five".