706431551 has 4 divisors (see below), whose sum is σ = 807350352. Its totient is φ = 605512752.

The previous prime is 706431529. The next prime is 706431553. The reversal of 706431551 is 155134607.

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 706431551 - 2¹⁴ = 706415167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706431553) 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, 50459390 + ... + 50459403.

It is an arithmetic number, because the mean of its divisors is an integer number (201837588).

Almost surely, 2^706431551 is an apocalyptic number.

706431551 is a deficient number, since it is larger than the sum of its proper divisors (100918801).

706431551 is a wasteful number, since it uses less digits than its factorization.

706431551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100918800.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 706431551 is about 26578.7800886346. The cubic root of 706431551 is about 890.6150489189.

The spelling of 706431551 in words is "seven hundred six million, four hundred thirty-one thousand, five hundred fifty-one".