158690749 has 4 divisors (see below), whose sum is σ = 181360864. Its totient is φ = 136020636.

The previous prime is 158690747. The next prime is 158690783. The reversal of 158690749 is 947096851.

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 158690749 - 2¹ = 158690747 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 (158690747) 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, 11335047 + ... + 11335060.

It is an arithmetic number, because the mean of its divisors is an integer number (45340216).

Almost surely, 2^158690749 is an apocalyptic number.

It is an amenable number.

158690749 is a deficient number, since it is larger than the sum of its proper divisors (22670115).

158690749 is an equidigital number, since it uses as much as digits as its factorization.

158690749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22670114.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 158690749 is about 12597.2516447041. The cubic root of 158690749 is about 541.3986934015.

The spelling of 158690749 in words is "one hundred fifty-eight million, six hundred ninety thousand, seven hundred forty-nine".