151649749 has 2 divisors, whose sum is σ = 151649750. Its totient is φ = 151649748.

The previous prime is 151649747. The next prime is 151649759. The reversal of 151649749 is 947946151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148474225 + 3175524 = 12185^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 151649749 - 2¹ = 151649747 is a prime.

Together with 151649747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 151649699 and 151649708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151649747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75824874 + 75824875.

It is an arithmetic number, because the mean of its divisors is an integer number (75824875).

Almost surely, 2^151649749 is an apocalyptic number.

It is an amenable number.

151649749 is a deficient number, since it is larger than the sum of its proper divisors (1).

151649749 is an equidigital number, since it uses as much as digits as its factorization.

151649749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 151649749 is about 12314.6152599259. The cubic root of 151649749 is about 533.2700976676.

The spelling of 151649749 in words is "one hundred fifty-one million, six hundred forty-nine thousand, seven hundred forty-nine".