149015917 has 4 divisors (see below), whose sum is σ = 156858880. Its totient is φ = 141172956.

The previous prime is 149015861. The next prime is 149015921. The reversal of 149015917 is 719510941.

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 a cyclic number.

It is not a de Polignac number, because 149015917 - 2²³ = 140627309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149015927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3921453 + ... + 3921490.

It is an arithmetic number, because the mean of its divisors is an integer number (39214720).

Almost surely, 2^149015917 is an apocalyptic number.

It is an amenable number.

149015917 is a deficient number, since it is larger than the sum of its proper divisors (7842963).

149015917 is an equidigital number, since it uses as much as digits as its factorization.

149015917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7842962.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 149015917 is about 12207.2075840464. The cubic root of 149015917 is about 530.1647962675.

The spelling of 149015917 in words is "one hundred forty-nine million, fifteen thousand, nine hundred seventeen".