626743997 has 8 divisors (see below), whose sum is σ = 713448000. Its totient is φ = 544994560.

The previous prime is 626743993. The next prime is 626744003. The reversal of 626743997 is 799347626.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 626743997 - 2² = 626743993 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 (626743993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238372 + ... + 1238877.

It is an arithmetic number, because the mean of its divisors is an integer number (89181000).

Almost surely, 2^626743997 is an apocalyptic number.

It is an amenable number.

626743997 is a deficient number, since it is larger than the sum of its proper divisors (86704003).

626743997 is a wasteful number, since it uses less digits than its factorization.

626743997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477283.

The product of its digits is 3429216, while the sum is 53.

The square root of 626743997 is about 25034.8556416849. The cubic root of 626743997 is about 855.7824862399.

The spelling of 626743997 in words is "six hundred twenty-six million, seven hundred forty-three thousand, nine hundred ninety-seven".