6990545 has 16 divisors (see below), whose sum is σ = 8667648. Its totient is φ = 5409600.

The previous prime is 6990527. The next prime is 6990547. The reversal of 6990545 is 5450996.

It is not a de Polignac number, because 6990545 - 2⁸ = 6990289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6990499 and 6990508.

It is not an unprimeable number, because it can be changed into a prime (6990547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35387 + ... + 35583.

It is an arithmetic number, because the mean of its divisors is an integer number (541728).

Almost surely, 2^6990545 is an apocalyptic number.

It is an amenable number.

6990545 is a deficient number, since it is larger than the sum of its proper divisors (1677103).

6990545 is a wasteful number, since it uses less digits than its factorization.

6990545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 6990545 is about 2643.9638802374. The cubic root of 6990545 is about 191.2069520210.

The spelling of 6990545 in words is "six million, nine hundred ninety thousand, five hundred forty-five".