346721887 has 4 divisors (see below), whose sum is σ = 357906496. Its totient is φ = 335537280.

The previous prime is 346721863. The next prime is 346721911. The reversal of 346721887 is 788127643.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (346721863) and next prime (346721911).

It is a cyclic number.

It is not a de Polignac number, because 346721887 - 2⁷ = 346721759 is a prime.

It is a super-3 number, since 3×346721887³ (a number of 27 digits) contains 333 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 (346721807) 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, 5592258 + ... + 5592319.

It is an arithmetic number, because the mean of its divisors is an integer number (89476624).

Almost surely, 2^346721887 is an apocalyptic number.

346721887 is a deficient number, since it is larger than the sum of its proper divisors (11184609).

346721887 is a wasteful number, since it uses less digits than its factorization.

346721887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184608.

The product of its digits is 451584, while the sum is 46.

The square root of 346721887 is about 18620.4695698041. The cubic root of 346721887 is about 702.5227928759.

The spelling of 346721887 in words is "three hundred forty-six million, seven hundred twenty-one thousand, eight hundred eighty-seven".