696984551 has 4 divisors (see below), whose sum is σ = 697037400. Its totient is φ = 696931704.

The previous prime is 696984539. The next prime is 696984559. The reversal of 696984551 is 155489696.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 696984551 - 2²² = 692790247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 696984493 and 696984502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696984559) 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, 11540 + ... + 39078.

It is an arithmetic number, because the mean of its divisors is an integer number (174259350).

Almost surely, 2^696984551 is an apocalyptic number.

696984551 is a deficient number, since it is larger than the sum of its proper divisors (52849).

696984551 is a wasteful number, since it uses less digits than its factorization.

696984551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52848.

The product of its digits is 2332800, while the sum is 53.

The square root of 696984551 is about 26400.4649769658. The cubic root of 696984551 is about 886.6272002867.

The spelling of 696984551 in words is "six hundred ninety-six million, nine hundred eighty-four thousand, five hundred fifty-one".