149897793 has 4 divisors (see below), whose sum is σ = 199863728. Its totient is φ = 99931860.

The previous prime is 149897773. The next prime is 149897807. The reversal of 149897793 is 397798941.

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 149897793 - 2⁸ = 149897537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149897773) 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, 24982963 + ... + 24982968.

It is an arithmetic number, because the mean of its divisors is an integer number (49965932).

Almost surely, 2^149897793 is an apocalyptic number.

It is an amenable number.

149897793 is a deficient number, since it is larger than the sum of its proper divisors (49965935).

149897793 is an equidigital number, since it uses as much as digits as its factorization.

149897793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49965934.

The product of its digits is 3429216, while the sum is 57.

The square root of 149897793 is about 12243.2754195926. The cubic root of 149897793 is about 531.2085781222.

The spelling of 149897793 in words is "one hundred forty-nine million, eight hundred ninety-seven thousand, seven hundred ninety-three".