651140437 has 2 divisors, whose sum is σ = 651140438. Its totient is φ = 651140436.

The previous prime is 651140423. The next prime is 651140447. The reversal of 651140437 is 734041156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595652836 + 55487601 = 24406^2 + 7449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651140437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651140399 and 651140408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651140407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325570218 + 325570219.

It is an arithmetic number, because the mean of its divisors is an integer number (325570219).

Almost surely, 2^651140437 is an apocalyptic number.

It is an amenable number.

651140437 is a deficient number, since it is larger than the sum of its proper divisors (1).

651140437 is an equidigital number, since it uses as much as digits as its factorization.

651140437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 651140437 is about 25517.4535759350. The cubic root of 651140437 is about 866.7454201775.

The spelling of 651140437 in words is "six hundred fifty-one million, one hundred forty thousand, four hundred thirty-seven".