651989433 has 16 divisors (see below), whose sum is σ = 874169280. Its totient is φ = 432242496.

The previous prime is 651989383. The next prime is 651989473. The reversal of 651989433 is 334989156.

It is not a de Polignac number, because 651989433 - 2¹³ = 651981241 is a prime.

It is a super-2 number, since 2×651989433² = 850180441487322978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (651989473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786063 + ... + 786891.

It is an arithmetic number, because the mean of its divisors is an integer number (54635580).

Almost surely, 2^651989433 is an apocalyptic number.

It is an amenable number.

651989433 is a deficient number, since it is larger than the sum of its proper divisors (222179847).

651989433 is a wasteful number, since it uses less digits than its factorization.

651989433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976.

The product of its digits is 699840, while the sum is 48.

The square root of 651989433 is about 25534.0837509396. The cubic root of 651989433 is about 867.1219614802.

The spelling of 651989433 in words is "six hundred fifty-one million, nine hundred eighty-nine thousand, four hundred thirty-three".