651507049 has 2 divisors, whose sum is σ = 651507050. Its totient is φ = 651507048.

The previous prime is 651507029. The next prime is 651507071. The reversal of 651507049 is 940705156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410791824 + 240715225 = 20268^2 + 15515^2 .

It is a cyclic number.

It is not a de Polignac number, because 651507049 - 2²¹ = 649409897 is a prime.

It is a super-2 number, since 2×651507049² = 848922869793376802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 651506999 and 651507017.

It is not a weakly prime, because it can be changed into another prime (651507029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325753524 + 325753525.

It is an arithmetic number, because the mean of its divisors is an integer number (325753525).

Almost surely, 2^651507049 is an apocalyptic number.

It is an amenable number.

651507049 is a deficient number, since it is larger than the sum of its proper divisors (1).

651507049 is an equidigital number, since it uses as much as digits as its factorization.

651507049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 651507049 is about 25524.6361188558. The cubic root of 651507049 is about 866.9080577267.

The spelling of 651507049 in words is "six hundred fifty-one million, five hundred seven thousand, forty-nine".