149015813 has 2 divisors, whose sum is σ = 149015814. Its totient is φ = 149015812.

The previous prime is 149015759. The next prime is 149015821. The reversal of 149015813 is 318510941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81414529 + 67601284 = 9023^2 + 8222^2 .

It is a cyclic number.

It is not a de Polignac number, because 149015813 - 2⁶ = 149015749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149015813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149015213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74507906 + 74507907.

It is an arithmetic number, because the mean of its divisors is an integer number (74507907).

Almost surely, 2^149015813 is an apocalyptic number.

It is an amenable number.

149015813 is a deficient number, since it is larger than the sum of its proper divisors (1).

149015813 is an equidigital number, since it uses as much as digits as its factorization.

149015813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 149015813 is about 12207.2033242672. The cubic root of 149015813 is about 530.1646729313.

The spelling of 149015813 in words is "one hundred forty-nine million, fifteen thousand, eight hundred thirteen".