649694051 has 2 divisors, whose sum is σ = 649694052. Its totient is φ = 649694050.

The previous prime is 649694033. The next prime is 649694057. The reversal of 649694051 is 150496946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649694051 - 2¹⁸ = 649431907 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 649693993 and 649694011.

It is not a weakly prime, because it can be changed into another prime (649694057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324847025 + 324847026.

It is an arithmetic number, because the mean of its divisors is an integer number (324847026).

Almost surely, 2^649694051 is an apocalyptic number.

649694051 is a deficient number, since it is larger than the sum of its proper divisors (1).

649694051 is an equidigital number, since it uses as much as digits as its factorization.

649694051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 649694051 is about 25489.0967082005. The cubic root of 649694051 is about 866.1031737611.

The spelling of 649694051 in words is "six hundred forty-nine million, six hundred ninety-four thousand, fifty-one".