696542381 has 4 divisors (see below), whose sum is σ = 696787200. Its totient is φ = 696297564.

The previous prime is 696542351. The next prime is 696542437. The reversal of 696542381 is 183245696.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-696542381 is a prime.

It is a super-2 number, since 2×696542381² = 970342577058298322, 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 (696542311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118091 + ... + 123848.

It is an arithmetic number, because the mean of its divisors is an integer number (174196800).

Almost surely, 2^696542381 is an apocalyptic number.

It is an amenable number.

696542381 is a deficient number, since it is larger than the sum of its proper divisors (244819).

696542381 is a wasteful number, since it uses less digits than its factorization.

696542381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244818.

The product of its digits is 311040, while the sum is 44.

The square root of 696542381 is about 26392.0893640500. The cubic root of 696542381 is about 886.4396672528.

The spelling of 696542381 in words is "six hundred ninety-six million, five hundred forty-two thousand, three hundred eighty-one".