690949 has 12 divisors (see below), whose sum is σ = 820800. Its totient is φ = 579768.

The previous prime is 690929. The next prime is 690953. The reversal of 690949 is 949096.

It is not a de Polignac number, because 690949 - 2¹⁷ = 559877 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2772 + ... + 3010.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁶⁹⁰⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

690949 is a deficient number, since it is larger than the sum of its proper divisors (129851).

690949 is a wasteful number, since it uses less digits than its factorization.

690949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 690949 is about 831.2334208873. The cubic root of 690949 is about 88.4060522190.

The spelling of 690949 in words is "six hundred ninety thousand, nine hundred forty-nine".