494397551 has 8 divisors (see below), whose sum is σ = 502467840. Its totient is φ = 486377752.

The previous prime is 494397523. The next prime is 494397571. The reversal of 494397551 is 155793494.

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

It is a cyclic number.

It is not a de Polignac number, because 494397551 - 2²² = 490203247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 494397496 and 494397505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494397511) 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, 7376 + ... + 32298.

It is an arithmetic number, because the mean of its divisors is an integer number (62808480).

Almost surely, 2^494397551 is an apocalyptic number.

494397551 is a deficient number, since it is larger than the sum of its proper divisors (8070289).

494397551 is a wasteful number, since it uses less digits than its factorization.

494397551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25245.

The product of its digits is 680400, while the sum is 47.

The square root of 494397551 is about 22235.0523048631. The cubic root of 494397551 is about 790.7249399637.

The spelling of 494397551 in words is "four hundred ninety-four million, three hundred ninety-seven thousand, five hundred fifty-one".