646902934 has 4 divisors (see below), whose sum is σ = 970354404. Its totient is φ = 323451466.

The previous prime is 646902929. The next prime is 646902943. The reversal of 646902934 is 439209646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 439209646 = 2 ⋅219604823.

It is a super-4 number, since 4×646902934⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161725732 + ... + 161725735.

It is an arithmetic number, because the mean of its divisors is an integer number (242588601).

Almost surely, 2^646902934 is an apocalyptic number.

646902934 is a deficient number, since it is larger than the sum of its proper divisors (323451470).

646902934 is a wasteful number, since it uses less digits than its factorization.

646902934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323451469.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 646902934 is about 25434.2865832718. The cubic root of 646902934 is about 864.8611197394.

The spelling of 646902934 in words is "six hundred forty-six million, nine hundred two thousand, nine hundred thirty-four".