651047923 has 4 divisors (see below), whose sum is σ = 651160408. Its totient is φ = 650935440.

The previous prime is 651047921. The next prime is 651047951. The reversal of 651047923 is 329740156.

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

It is a cyclic number.

It is not a de Polignac number, because 651047923 - 2¹ = 651047921 is a prime.

It is a super-2 number, since 2×651047923² = 847726796085227858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651047921) 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, 47061 + ... + 59302.

It is an arithmetic number, because the mean of its divisors is an integer number (162790102).

Almost surely, 2^651047923 is an apocalyptic number.

651047923 is a deficient number, since it is larger than the sum of its proper divisors (112485).

651047923 is a wasteful number, since it uses less digits than its factorization.

651047923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112484.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 651047923 is about 25515.6407522915. The cubic root of 651047923 is about 866.7043691849.

The spelling of 651047923 in words is "six hundred fifty-one million, forty-seven thousand, nine hundred twenty-three".