149081951 has 4 divisors (see below), whose sum is σ = 151894872. Its totient is φ = 146269032.

The previous prime is 149081941. The next prime is 149081969. The reversal of 149081951 is 159180941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159180941 = 179 ⋅889279.

It is a cyclic number.

It is not a de Polignac number, because 149081951 - 2⁶ = 149081887 is a prime.

It is a super-2 number, since 2×149081951² = 44450856227932802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149081941) 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, 1406381 + ... + 1406486.

It is an arithmetic number, because the mean of its divisors is an integer number (37973718).

Almost surely, 2^149081951 is an apocalyptic number.

149081951 is a deficient number, since it is larger than the sum of its proper divisors (2812921).

149081951 is an equidigital number, since it uses as much as digits as its factorization.

149081951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812920.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 149081951 is about 12209.9119980449. The cubic root of 149081951 is about 530.2430960288.

The spelling of 149081951 in words is "one hundred forty-nine million, eighty-one thousand, nine hundred fifty-one".