690311403 has 10 divisors (see below), whose sum is σ = 1031206044. Its totient is φ = 460207548.

The previous prime is 690311393. The next prime is 690311411. The reversal of 690311403 is 304113096.

It is not a de Polignac number, because 690311403 - 2¹⁸ = 690049259 is a prime.

It is a super-2 number, since 2×690311403² = 953059666223656818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (690331403) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4261101 + ... + 4261262.

Almost surely, 2^690311403 is an apocalyptic number.

690311403 is a deficient number, since it is larger than the sum of its proper divisors (340894641).

690311403 is an equidigital number, since it uses as much as digits as its factorization.

690311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522375 (or 8522366 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 690311403 is about 26273.7778593030. Note that the first 3 decimals coincide. The cubic root of 690311403 is about 883.7885060649.

Adding to 690311403 its reverse (304113096), we get a palindrome (994424499).

The spelling of 690311403 in words is "six hundred ninety million, three hundred eleven thousand, four hundred three".