764620149 has 4 divisors (see below), whose sum is σ = 1019493536. Its totient is φ = 509746764.

The previous prime is 764620141. The next prime is 764620187. The reversal of 764620149 is 941026467.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 764620149 - 2³ = 764620141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764620141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127436689 + ... + 127436694.

It is an arithmetic number, because the mean of its divisors is an integer number (254873384).

Almost surely, 2^764620149 is an apocalyptic number.

It is an amenable number.

764620149 is a deficient number, since it is larger than the sum of its proper divisors (254873387).

764620149 is a wasteful number, since it uses less digits than its factorization.

764620149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254873386.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 764620149 is about 27651.7657483207. The cubic root of 764620149 is about 914.4260283942.

The spelling of 764620149 in words is "seven hundred sixty-four million, six hundred twenty thousand, one hundred forty-nine".