690628783 has 4 divisors (see below), whose sum is σ = 743754088. Its totient is φ = 637503480.

The previous prime is 690628781. The next prime is 690628817. The reversal of 690628783 is 387826096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690628783 - 2¹ = 690628781 is a prime.

It is a super-2 number, since 2×690628783² = 953936231816122178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690628781) 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, 26562633 + ... + 26562658.

It is an arithmetic number, because the mean of its divisors is an integer number (185938522).

Almost surely, 2^690628783 is an apocalyptic number.

690628783 is a deficient number, since it is larger than the sum of its proper divisors (53125305).

690628783 is a wasteful number, since it uses less digits than its factorization.

690628783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53125304.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 690628783 is about 26279.8170275213. The cubic root of 690628783 is about 883.9239298840.

The spelling of 690628783 in words is "six hundred ninety million, six hundred twenty-eight thousand, seven hundred eighty-three".