651367427 has 4 divisors (see below), whose sum is σ = 689683176. Its totient is φ = 613051680.

The previous prime is 651367399. The next prime is 651367433. The reversal of 651367427 is 724763156.

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 651367427 - 2⁶ = 651367363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651367477) 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, 19157849 + ... + 19157882.

It is an arithmetic number, because the mean of its divisors is an integer number (172420794).

Almost surely, 2^651367427 is an apocalyptic number.

651367427 is a deficient number, since it is larger than the sum of its proper divisors (38315749).

651367427 is a wasteful number, since it uses less digits than its factorization.

651367427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38315748.

The product of its digits is 211680, while the sum is 41.

The square root of 651367427 is about 25521.9009284183. The cubic root of 651367427 is about 866.8461253784.

The spelling of 651367427 in words is "six hundred fifty-one million, three hundred sixty-seven thousand, four hundred twenty-seven".